A Schild – AS Calibre 1287 Watch spare parts

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A. Schild (AS) Calibre 1287 Watch Spare Parts: Technical Overview and Sourcing Guide

A. Schild (AS) Calibre 1287 is a well-crafted vintage Swiss manual wind movement, introduced in the late 1940s. Known for its reliable construction, it features a directly driven sweep seconds hand, making it a popular choice among collectors and repair watchmakers specializing in mid-20th-century wristwatches.
Key Technical Highlights

Calibre: AS 1287

Movement Type: Manual wind, mechanical

Size: 10 1/2 lignes (approx. 23.2–23.7 mm diameter)

Height: Around 4.5 mm

Jewels: 17 synthetic ruby jewels, including cap jewels on escapement and gear train for reduced friction

Beat Rate: 18,000 vibrations per hour (vph)

Escapement: Pallet lever

Balance: Nickel screw balance with Unishock shock protection, hairspring moves counterclockwise

Winding: Yoke winding system

Power Reserve: Approximately 40 hours

Regulation: Long regulator arm with adjustable stud holder

Construction: Solid construction with separate center minute wheel bridge, considered state-of-the-art in its era

Common Spare Parts and Service Components

Mainspring and Barrel: Regular replacement needed due to fatigue; accurate sizing critical for proper power delivery.

Balance Staff and Balance Assembly: Delicate parts prone to wear or shock damage; original or compatible replacements recommended.

Pallet Fork and Escape Wheel: High wear components requiring correct fit for smooth escapement operation.

Wheels (Minute, Third, Fourth): Susceptible to tooth wear; sourcing from donor movements or NOS parts common.

Stem, Crown, and Winding Mechanism Components: Essential parts subject to wear; exact replacements necessary for reliable winding and time setting.

Jewels and Cap Jewels: Maintain low friction and durability; matching the original jewel setup is important.

Hands and Dial Components: Period-correct or restored hands and dials keep watch authenticity intact.

Sourcing Tips

Prefer original AS 1287-labeled spare parts or reliable donor movements for compatibility.

Sourcing from specialized vintage watch suppliers or watchmaker networks enhances chances of finding rare components.

Careful handling during servicing is necessary due to the movement’s delicate balance and escapement assembly.

Use modern synthetic oils sparingly, observing vintage lubrication standards.

Why AS 1287 Spare Parts Matter

Maintaining original or authentic spare parts ensures the reliable function, accuracy, and historical integrity of the watch.

The movement’s robust design and shock protection underscore its lasting appeal to collectors and vintage watch enthusiasts.

Proper parts sourcing facilitates effective restoration, preserving both the technical and aesthetic aspects of these mid-century Swiss watches.

AS Calibre 1287 stands as an exemplary Swiss manual-wind movement. Obtaining the correct spare parts is essential for sustaining its performance and preserving vintage watch heritage.

A Schild – AS Calibre 1294 Watch spare parts

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A. Schild (AS) Calibre 1294 Watch Spare Parts: Technical Overview and Sourcing Guide

A. Schild (AS) Calibre 1294 is a vintage Swiss manual-wind mechanical movement widely respected for its robust construction and precise timekeeping. Produced primarily in the mid-20th century, it is characterized by a sweep seconds hand and a compact size, making it popular among collectors and watchmakers specializing in vintage wristwatches.
Key Technical Highlights

Calibre: AS 1294

Movement Type: Manual wind, mechanical

Diameter: 11.5 lignes (approx. 25.6 mm)

Height: Approximately 4.50 mm

Jewels: Usually 15 or 17 synthetic ruby jewels

Beat Rate: 18,000 vibrations per hour (A/h)

Power Reserve: Approximately 40 hours

Functions: Hours, minutes, sweep seconds

Shock Protection: Usually equipped with shock protection on the balance

Common Spare Parts and Components

Mainspring and Barrel: Critical for consistent power supply; mainsprings tend to fatigue over time and require precise sizing for proper function.

Balance Wheel and Balance Staff: Delicate parts crucial for accurate timekeeping. Often sourced from donor movements or original spare parts due to vulnerability to shock and wear.

Pallet Fork and Escape Wheel: Essential escapement components that may need replacement due to wear or damage to ensure smooth operation.

Wheels (Minute, Third, Fourth): Frequently subject to wear; sourcing original or compatible wheels is important for maintaining correct movement function.

Stem, Crown, and Setting Mechanism: Key for manual winding and time setting; these parts often wear out and must be replaced with compatible components.

Jewels: Synthetic ruby bearings reduce friction; replacements must match the original count and placement.

Hands and Dial: Period-correct or restored hands, especially for sweep seconds, maintain watch authenticity.

Sourcing and Maintenance Tips

Original or NOS Parts: Obtain spare parts explicitly identified for AS 1294 to ensure compatibility and maintain authenticity.

Donor Movements: Salvaging parts from non-working AS 1294 movements is often the most reliable sourcing method for rare or hard-to-find components.

Careful Handling: The balance and escapement require delicate handling during maintenance due to their vulnerability.

Lubrication: Use modern synthetic oils sparingly and in accordance with vintage watch servicing standards.

Identification: The calibre number is typically stamped on the movement’s main plate or under the balance cock, aiding accurate parts ordering.

Why AS 1294 Spare Parts Matter

Reliable Performance: Using authentic or compatible parts helps preserve the movement’s consistent power delivery, accuracy, and durability.

Collector Value: Maintaining the originality of vintage watches through correct parts sourcing retains historical and monetary value.

Watchmaker Support: The AS 1294 is well documented and recognized among watchmakers, making sourcing and repairs feasible with the right expertise.

A. Schild AS 1294 is a hallmark of mid-20th-century Swiss horology. Access to accurate and quality spare parts is key to sustaining its legacy as a reliable and collectible vintage mechanical movement.

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A. Schild (AS) Calibre 1298N Watch Spare Parts: Technical Overview and Sourcing Guide

A. Schild (AS) Calibre 1298N is a vintage Swiss automatic mechanical movement, part of the trusted AS family known for robust construction and reliable performance in mid-20th-century wristwatches. This movement is appreciated for its durable automatic winding and accurate timekeeping, making it popular among collectors and watchmakers restoring classic Swiss timepieces.
Key Technical Highlights

Calibre: AS 1298N

Movement Type: Automatic winding mechanical

Diameter: Approximately 27.64 mm (12.25 lignes)

Jewels: 17 synthetic ruby jewels

Beat Rate: 18,000 vibrations per hour (vph)

Power Reserve: Around 36 hours

Functions: Hours, minutes, sweeping seconds, automatic rotor winding

Era of Use: Approximately from 1946 onwards

Hands Size: Around 1.30 x 0.90 mm

Common Spare Parts and Service Components

Mainspring and Barrel: Essential for consistent power storage and transmission; frequent replacement due to fatigue or breakage given the movement’s age.

Balance Wheel and Staff: Key for the precision of timekeeping; replacement needed if damaged, matched carefully to the movement’s specifications.

Rotor Assembly: Vital for the automatic winding function; worn bearings or a damaged rotor axle can impact winding efficiency.

Pallet Fork and Escape Wheel: Regular maintenance items prone to wear; authentic or compatible parts ensure smooth escapement function.

Wheels (Minute, Third, Fourth): Replaceable parts that suffer from wear and require sourcing from donor movements or new-old-stock (NOS).

Setting Mechanism (Stem, Crown, Setting Lever): Important for reliable manual winding and time setting; replacement parts must fit precisely.

Jewels: Synthetic ruby bearings that reduce friction; replacements must match original type and positioning.

Hands and Dial Components: Period-accurate or refurbished parts maintain the movement’s visual authenticity in restoration.

Sourcing and Maintenance Tips

Original or NOS Parts: Seek parts explicitly marked or designed for the AS 1298/1298N to ensure compatibility and maintain movement integrity.

Donor Movements: Salvaged AS 1298 movements or closely related calibres are invaluable for sourcing rare components.

Careful Handling: Components such as the rotor and balance assembly require expert handling given their delicate nature.

Lubrication: Use modern synthetic oils sparingly following vintage watch servicing norms to protect the movement.

Identification: The calibre number is typically stamped on the main plate or near the balance cock, essential to verify before parts ordering.

Why AS 1298N Spare Parts Matter

Durability and Reliability: Maintaining the movement with authentic spare parts preserves the hallmark precision and robustness of AS calibres.

Collector and Restoration Appeal: Properly restored watches retain historical accuracy and operational authenticity, highly valued by collectors.

Watchmaker Familiarity: The AS 1298N is a known classic in the vintage watch servicing community, facilitating sourcing and repairs.

A. Schild AS 1298N remains a solid example of mid-20th century Swiss automatic watch engineering, with appropriate spare parts crucial to sustaining its functionality and longevity in vintage watch restoration.

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A. Schild (AS) Calibre 1315 Watch Spare Parts: Technical Overview and Sourcing Guide

A. Schild (AS) Calibre 1315 is a vintage Swiss automatic mechanical movement produced in the early 1950s, belonging to the ETA family 1306-1320 series. It is known for its robust construction, reliable automatic winding, and sweep seconds function, making it a valued choice among mid-century wristwatch collectors and repairers.
Key Technical Highlights

Calibre: AS 1315

Movement Type: Automatic, self-winding mechanical

Diameter: 12.5 lignes (approximately 28 mm)

Height: About 6.3 mm

Jewels: 17 synthetic ruby jewels

Beat Rate: 18,000 vibrations per hour (vph)

Power Reserve: Approximately 33 hours

Period of Production: Circa 1951–1953

Winding System: Traditional automatic with a sweep seconds display

Common Spare Parts and Service Components

Mainspring and Barrel: Critical for power storage and transmission; mainsprings may require replacement due to age-related fatigue or breakage.

Balance Wheel and Balance Staff: Essential for timing accuracy; prone to shock damage, requiring exact replacements matched to the original specifications.

Pallet Fork and Escape Wheel: Prone to wear given the movement’s oscillations; sourcing original or compatible parts is important for reliable escapement operation.

Wheels (Minute, Third, Fourth): Susceptible to wear or damage; often sourced from donor movements or new-old-stock (NOS) to maintain precision.

Stem, Crown, and Setting Mechanism: Important for winding and time setting; these components typically wear and require precise matching replacements.

Jewels: Replacement ruby bearings maintain movement durability and smooth gear train operation.

Rotor and Automatic Winding Components: Wear on rotor axle or bearings can reduce winding efficiency and needs expert inspection and replacement as needed.

Hands and Dials: Period-appropriate hands and dials help preserve vintage aesthetics during restoration.

Sourcing and Maintenance Tips

Original Parts: Prefer parts explicitly designed and labeled for AS 1315 to ensure compatibility and preserve authenticity.

Donor Movements: Non-working or damaged AS 1315 calibers are valuable sources for hard-to-find components.

Handling: The movement’s balance and escapement components require careful handling during servicing due to delicate shock resistance.

Lubrication: Use modern synthetic oils sparingly, respecting the vintage lubrication standards for longevity and reliability.

Identification: The AS 1315 calibre number is typically stamped on the movement’s main plate and is essential for accurate parts ordering.

Why AS 1315 Spare Parts Matter

Robustness and Reliability: Maintaining original-quality parts ensures the movement’s well-known reliability and precise timekeeping.

Collector Appeal: Correct restoration with authentic parts enhances the historical value and keeps the movement functioning as designed.

Watchmaker Familiarity: AS 1315 is well regarded in vintage watch repair circles, easing parts sourcing and servicing.

The A. Schild AS 1315 remains a distinguished automatic watch movement from the 1950s. Accurate and quality spare parts sourcing is essential to retain its performance, authenticity, and collectible status.

A Schild – AS Calibre 1320 Watch spare parts

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A. Schild (AS) Calibre 1320 Watch Spare Parts: Technical Overview and Sourcing Guide

A. Schild (AS) Calibre 1320 is a vintage Swiss automatic mechanical movement featuring a sweep second hand, known for its reliable design and mid-20th century production. It is popular among vintage watch collectors and watchmakers for repair and restoration work.
Key Technical Highlights

Calibre: AS 1320

Movement Type: Automatic winding, mechanical

Diameter: Approximately 20.5 mm (about 9.25 lignes)

Height: Around 5.3 to 5.6 mm

Jewels: 17 synthetic ruby jewels

Beat Rate: 18,000 vibrations per hour (vph)

Power Reserve: Approximately 34 to 39 hours

Functions: Hours, minutes, sweep seconds, automatic winding with rotor

Shock Protection: Typically includes shock protection systems suitable for vintage automatics

Common Spare Parts

Mainspring and Barrel: Essential for power delivery; frequent replacement required due to fatigue or breakage in vintage movements.

Balance Wheel and Balance Staff: Vital for accuracy; delicate parts that may require precise replacement after shock damage or wear.

Rotor Assembly: Key automatic winding component; rotor bearings, pins, or axles may wear over time affecting winding efficiency.

Pallet Fork and Escape Wheel: Escapement components subject to wear; authentic or compatible parts ensure reliable operation.

Wheels (Minute, Third, Fourth): Common wear points; usually sourced from donor movements or new-old-stock (NOS).

Stem, Crown, and Setting Mechanism: Crucial for winding and time setting functions; wear-prone with age, needing exact fit replacements.

Jewels: Synthetic ruby bearings required for smooth gear operation and durability; must match original placement.

Hands and Dial Components: Period-accurate or restored parts maintain authenticity during restoration.

Sourcing and Maintenance Tips

Original or NOS Parts: Prioritize sourcing parts explicitly marked for AS 1320 to guarantee fit and authenticity.

Donor Movements: Salvage non-functional AS 1320 movements to obtain rare or hard-to-find parts.

Careful Handling: Delicate balance and escapement require expert handling during disassembly.

Lubrication: Use modern synthetic oils sparingly, respecting vintage lubrication standards.

Identification: The calibre number is generally engraved on the movement’s main plate or under the balance cock, essential for correct part ordering.

Why AS 1320 Spare Parts Matter

Reliable and Robust: Maintaining the AS 1320 with genuine parts preserves the movement’s renowned reliability and precise timekeeping.

Collector and Repair Value: Correct restoration with authentic components sustains vintage watch value and usability.

Watchmaker Familiarity: A recognized vintage calibre, AS 1320 benefits from established repair and parts sourcing networks.

The A. Schild AS 1320 remains a desirable automatic movement for vintage watch enthusiasts. Access to quality spare parts is crucial to keep these classic timepieces running authentically and reliably.

A Schild – AS Calibre 1323 Watch spare parts

A. Schild (AS) Calibre 1323 Watch Spare Parts: Technical Overview and Sourcing Guide

A. Schild (AS) Calibre 1323 is a vintage Swiss manual-wind mechanical movement prized for its compact size, reliable construction, and sweeping central seconds function. It remains a popular choice among collectors and watchmakers specializing in mid-20th-century wristwatch restoration.
Key Technical Highlights

Calibre: AS 1323

Movement Type: Manual wind, mechanical

Diameter: Approximately 20.7 mm (about 9.25 lignes)

Height: 5.3 mm

Jewels: 17 synthetic ruby jewels

Beat Rate: 18,000 vibrations per hour (vph)

Power Reserve: Around 39 hours

Functions: Hours, minutes, sweep central seconds

Shock Protection: Present in many versions, generally basic

Common Spare Parts and Service Needs

Mainspring and Barrel: Fatigue or breakage requires mainspring replacements matching the original 20.7 mm diameter for consistent power delivery.

Balance Wheel and Balance Staff: Critical for accuracy; these delicate parts often need replacement to match exact dimensions and shock protection type.

Pallet Fork and Escape Wheel: Escapement components that wear over time; original or new-old-stock (NOS) parts ensure reliable operation.

Wheels (Minute, Third, Fourth): Common wear on pivots and teeth; donor movements or specialized spares are typical sources.

Setting Mechanism (Stem, Crown, Levers, Springs): Essential for winding and time setting; need precise fitting to AS 1323’s compact design.

Jewels: Synthetic ruby bearings must match original count and placement for smooth gear train operation.

Hands and Dial: Period-correct hands, especially sweep seconds, and dials preserve watch authenticity; often sourced from vintage parts dealers.

Ratchet Wheel: Sometimes found as NOS specifically for AS 1323 models.

Sourcing and Maintenance Tips

Prefer original, NOS, or donor parts labeled for AS 1323 to ensure compatibility and authenticity.

Handle carefully during servicing due to limited shock protection and delicate components.

Use modern synthetic watch oils sparingly, respecting vintage lubrication standards.

Confirm the calibre number stamped on the main plate before ordering parts to ensure compatibility.

Why AS 1323 Spare Parts Matter

Using authentic parts maintains the movement’s historical reliability and precise timekeeping.

Proper restoration preserves both vintage market value and collector appeal.

The AS 1323 is well-documented, facilitating sourcing and technical support for repairs.

Sourcing quality spare parts is essential to keep the A. Schild AS 1323 running reliably and authentically, preserving its legacy as a classic Swiss manual-wind watch movement.

A Schild – AS Calibre 1336 Watch spare parts

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A. Schild (AS) Calibre 1336 Watch Spare Parts: Technical Overview and Sourcing Guide

A. Schild (AS) Calibre 1336 is a vintage Swiss automatic mechanical movement known for its robust construction, reliable automatic winding, and sweeping seconds function. Produced around the 1950s, it is prized by collectors and watchmakers restoring mid-20th-century wristwatches.
Key Technical Highlights

Calibre: AS 1336

Movement Type: Automatic winding, mechanical

Diameter: Approximately 25.38 mm (11.25 lignes)

Height: 5.75 mm

Jewels: 17 synthetic ruby jewels

Beat Rate: 18,000 vibrations per hour (vph)

Power Reserve: Approximately 38 hours

Functions: Hours, minutes, sweeping central seconds

Shock Protection & Winding: Incorporated automatic winding system with a yoke-type mechanism typical of the era

Common Spare Parts and Service Components

Mainspring and Barrel: Essential for reliable power storage; fatigued mainsprings require exact replacements to ensure consistent performance.

Balance Wheel and Balance Staff: Critical for timing precision; delicate parts prone to shock damage that must be matched precisely for compatibility.

Rotor Assembly: Key to automatic winding functionality; wear or damage to the rotor axle or bearings hampers winding efficiency.

Pallet Fork and Escape Wheel: Frequently worn escapement components requiring original or compatible parts to maintain smooth escapement action.

Gear Train Wheels: Minute, third, and fourth wheels can suffer wear or damage; often sourced from donor movements or new-old-stock (NOS).

Stem, Crown, Setting Lever & Springs: Vital for winding and time-setting; must fit the AS 1336 dimensions exactly.

Jewels: Synthetic ruby bearings reduce friction and wear; replacements have to match original count and placement.

Hands and Dial: Period-correct components preserve authenticity; often sourced from specialist vintage suppliers.

Sourcing and Maintenance Tips

Use original or NOS spare parts explicitly marked for AS 1336 to ensure perfect fit and authenticity.

Salvage donor movements are a valuable source for rare or worn components.

Careful handling during servicing is essential due to the delicate balance and rotor assembly.

Apply modern synthetic oils sparingly, adhering to vintage watch lubrication standards to maximize longevity.

Confirm the calibre number stamped on the main plate before ordering parts to avoid mismatches.

Why AS 1336 Spare Parts Matter

Maintaining original or compatible parts preserves precise timekeeping and reliable automatic winding.

Correct restoration enhances collector value and maintains the historical integrity of mid-century Swiss watches.

The AS 1336 remains well-regarded among vintage watchmakers, facilitating availability of technical data and parts.

Sourcing quality spare parts is crucial for sustaining the A. Schild AS 1336’s legacy as a durable and collectible automatic movement of Swiss horology.

A Schild – AS Calibre 1361 Watch spare parts

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A. Schild (AS) Calibre 1361 Watch Spare Parts: Technical Overview and Sourcing Guide

A. Schild (AS) Calibre 1361 is a vintage Swiss automatic mechanical movement highly regarded for its robust design and reliable automatic winding. Produced around the 1950s, this calibre features a classic sweep seconds function and remains a favored choice among collectors and watchmakers restoring mid-20th-century wristwatches.
Key Technical Highlights

Calibre: AS 1361 (including AS 1361N variant)

Movement Type: Automatic, self-winding mechanical

Diameter: Approximately 25.6 mm (11.5 lignes)

Height: 5.75 mm

Jewels: 17 synthetic ruby jewels

Beat Rate: 18,000 vibrations per hour (vph)

Power Reserve: Around 38 hours

Lift Angle: 52 degrees

Functions: Central hours, central minutes, sweeping central seconds

Shock Protection: Incabloc anti-shock system

Hand Sizes: Hour – 1.3 mm, Minute – 0.9 mm, Seconds – 0.2 mm

Additional Info: Hand-windable in addition to automatic winding; no hacking function

Common Spare Parts and Components

Mainspring and Barrel: Critical for power delivery; fatigue from age requires exact replacement for consistent performance.

Balance Wheel and Balance Staff: Essential for timing accuracy and prone to shock damage; precise matching parts needed for reliable operation.

Rotor Assembly and Bearings: Key for automatic winding function; wear here can reduce efficiency and requires specialist replacement.

Pallet Fork and Escape Wheel: Escapement parts subjected to wear; sourcing genuine or compatible parts is crucial.

Gear Train Wheels (Center, Third, Sweep Second): Tooth wear and pivot damage common; donor movements or new-old-stock (NOS) parts often used.

Setting Mechanism (Stem, Crown, Levers, Springs): Necessary for reliable winding and time adjustment; must be dimensionally accurate.

Jewels: Synthetic ruby bearings must match original placement for low friction and durability.

Hands and Dial Components: Period-correct parts maintain authenticity and aesthetic integrity during restoration.

Sourcing and Maintenance Tips

Prioritize original or NOS spare parts labeled for AS 1361 to ensure compatibility and genuine quality.

Salvage donor movements are valuable sources for rare or worn components such as balance assemblies and gear wheels.

Handle balance and rotor assemblies carefully due to their delicate nature and anti-shock components.

Use modern synthetic oils sparingly, adhering to vintage lubrication standards to prolong movement longevity.

Always verify the calibre number stamped on the main plate before ordering parts.

Why AS 1361 Spare Parts Matter

Preserving the Movement’s Reliability: Using authentic parts retains the renowned robust automatic winding and accurate timekeeping.

Maintaining Collector Value: Correct restoration with original components preserves vintage appeal and historical integrity.

Facilitating Effective Service: AS 1361 is well documented and recognized among watchmakers, making parts sourcing and servicing more accessible.

The A. Schild AS 1361 remains a classic Swiss automatic calibre whose legacy depends on careful sourcing and fitting of quality spare parts to keep these elegant vintage watches running reliably and authentically.

A Schild – AS Calibre 1149 Watch spare parts

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A. Schild (AS) Calibre 1149 Watch Spare Parts: Technical Overview and Sourcing Guide

A. Schild (AS) Calibre 1149 is a robust Swiss manual-wind mechanical movement from the mid-20th century, widely respected for precision and reliability. It is popular among vintage watch collectors and repairers due to its solid construction and classic design.
Key Technical Highlights

Calibre: AS 1149

Diameter: 29.00 mm (13 lignes)

Thickness: 3.80 mm

Jewels: Versions with 15, 16, 17, or 21 jewels

Beat Rate: 18,000 vibrations per hour (A/h)

Power Reserve: Approximately 41 hours

Winding: Manual wind, traditional yoke system

Shock Protection: Generally none or minimal on earlier variants

Common Spare Parts

Mainspring: Essential for providing power; prone to fatigue and breakage over decades and needs precise sizing for AS 1149.

Balance Staff and Balance Assembly: Delicate parts that control timekeeping accuracy; often require replacement if damaged due to wear or shock.

Pallet Fork and Escape Wheel: Components that experience wear and may require original or compatible replacements for correct escapement function.

Wheels (Minute, Third, Fourth): Wear and tooth damage are common; sourcing from donor movements or new-old-stock (NOS) is typical.

Stem, Crown, and Setting Mechanism: Critical for winding and time setting; tend to wear and may need original compatible replacements.

Jewels: Ruby bearings ensure smooth gear train operation; matching jewel count and placement is necessary for repairs.

Hands and Dials: Period-accurate parts maintain watch authenticity during restoration; these are often scarce and sourced from collectors or specialists.

Sourcing and Maintenance Tips

Original Parts: Recommended to use parts explicitly for AS 1149 due to specific dimensions and design.

Donor Movements: Non-working AS 1149 movements are valuable sources of spare parts, especially balance and wheels.

Compatibility: Some parts may interchange with similar AS calibers, but careful verification of fit is needed.

Handling: Careful disassembly and reassembly are crucial due to limited shock protection on many models.

Lubrication: Use suitable modern synthetic oils sparingly, respecting the original lubrication standards.

Why AS 1149 Spare Parts Matter

Durability and Precision: Maintaining original or authentic parts ensures the movement’s reliability and timekeeping accuracy.

Collector Value: Proper restoration with correct components preserves historical and monetary value.

Watchmaker Support: Being a classic movement, many watchmakers are familiar with the servicing requirements of AS 1149, facilitating repairs and sourcing.

A. Schild AS 1149 remains one of the prized manual movements in vintage horology, and sourcing quality spare parts is vital for keeping these exceptional timepieces operational and authentic.

A Schild – AS Calibre 1187 Watch spare parts

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A. Schild (AS) Calibre 1187 Watch Spare Parts: Technical Overview and Sourcing Guide

A. Schild (AS) Calibre 1187 is a classic Swiss manual-wind mechanical movement from the mid-20th century, renowned for its robust construction and reliable sweep seconds function. It is a popular choice among vintage watch collectors and repairers. Proper sourcing of authentic spare parts is essential to maintain its originality and performance.
Key Technical Highlights

Calibre: AS 1187

Size: 10 1/2 lignes (approx. 23.3 mm diameter)

Beat Rate: 18,000 vibrations per hour (A/h)

Jewels: Typically available in 7 or 15 jewel versions

Shock Protection: Equipped with Incabloc shock protection on balance wheel

Balance: Nickel screw balance with a long regulator arm and counterclockwise hairspring

Winding: Manual wind with a yoke winding system on the dial side

Special Feature: Directly driven center seconds hand, requiring a two-layer construction that increases movement height

Common Spare Parts and Maintenance Components

Mainspring and Barrel: Critical for power delivery; fatigue or breakage over time makes replacement necessary. Common mainspring dimensions are approximately 1.60 mm wide, 290-300 mm length.

Balance Staff and Balance Assembly: Delicate parts that influence timekeeping accuracy; replacement usually requires exact parts matched to shock or non-shock variants.

Pallet Fork and Escape Wheel: High-wear components requiring original or compatible replacements to ensure smooth escapement operation.

Minute, Third, and Fourth Wheels: Prone to wear or damage; frequently sourced from donor AS 1187 movements or NOS (new-old-stock).

Stem, Crown, and Setting Mechanism: Essential for reliable winding and time setting; replacement parts need to fit exactly to the AS 1187.

Jewels: Ruby bearings reduce friction; replacement jewels must match original jewel count and placement.

Hands and Dial: Period-correct hands and dials are often sought for authentic restoration since they are rare and typically sourced from collectors or specialists.

Sourcing and Service Tips

Original Parts: Prefer parts specifically marked for AS 1187 to maintain compatibility and authenticity.

Donor Movements: Non-functional AS 1187 movements are invaluable for harvesting rare parts like wheels and escapements.

Handling: The movement has limited shock protection so careful handling during servicing is crucial.

Lubrication: Use modern synthetic oils sparingly and according to vintage watch standards.

Identification: The calibre number is often stamped under the balance or on the main plate and essential for correct part ordering.

Why AS 1187 Spare Parts Matter

Robust and Reliable: Maintaining with original or authentic parts preserves the renowned reliability and precision of the AS 1187 movement.

Collector Value: Accurate restoration with genuine parts retains the movement’s historical and collector appeal.

Watchmaker Familiarity: AS 1187 remains well-known to vintage watchmakers, facilitating repairs with the right parts and expertise.

A. Schild AS 1187 is a hallmark of mid-20th-century Swiss watch engineering, and sourcing correct spare parts is key to sustaining its function and authenticity for generations.