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A. Schild (AS) Calibre 1191 Watch Spare Parts: Technical Overview and Sourcing Guide

A. Schild (AS) Calibre 1191 is a vintage Swiss automatic movement widely appreciated for its robust design, reliability, and classic construction. It was produced starting around 1935 and remains popular among collectors and watchmakers restoring mid-20th-century automatic watches.
Key Technical Highlights

Calibre: AS 1191

Type: Automatic winding movement

Size: 12.5 lignes (approx. 28 mm diameter)

Height: 6.15 mm

Jewels: 17 jewels

Frequency: 18,000 vibrations per hour (vph)

Power Reserve: Approximately 36 hours

Production Era: From 1935 onward

Common Spare Parts and Service Components

Mainspring and Barrel: Critical for power storage and transmission, mainsprings may require replacement when fatigued or broken.

Balance Wheel and Balance Staff: Key components for accurate timing; often require replacement or servicing due to shock damage or wear.

Rotor Assembly: Essential for automatic winding; worn or damaged rotor bearings or pins will affect winding efficiency.

Pallet Fork and Escape Wheel: These escapement parts wear with use and need authentic or compatible replacements to ensure smooth operation.

Wheels (Minute, Third, Fourth): Susceptible to pivot wear or tooth damage; donor movements often serve as the main parts source.

Setting Mechanism (Stem, Crown, Setting Lever): Worn parts can compromise time setting or winding function, necessitating precise replacement parts.

Jewels: High-quality synthetic ruby bearings are necessary for low friction and durability; proper jewel count and size must match the original.

Hands and Dial: Authentic replacement hands and dials are important for restoration but often scarce and may require sourcing from vintage stock.

Sourcing and Maintenance Tips

Original or NOS Parts: Preferably obtain parts explicitly marked or known to fit AS 1191 to guarantee compatibility.

Donor Movements: Non-operational AS 1191 movements are valuable for extracting rare or hard-to-find components.

Aftermarket Parts: Some basic components (such as mainsprings and generic jewels) may be available but should be carefully verified for fit.

Careful Handling: Due to the delicate nature of vintage automatic movements, components like the balance and escapement require expert handling during service.

Lubrication: Use modern synthetic oils sparingly to maintain longevity without compromising the original design.

Why AS 1191 Spare Parts Matter

Durability and Precision: Maintaining this movement with original or compatible parts preserves its hallmark reliability and timekeeping precision.

Collector and Repair Appeal: Accurate restoration supports the value and functionality of vintage watches featuring the AS 1191 movement.

Watchmaker Familiarity: AS 1191 is well-known among vintage Swiss automatic movements, making repair and sourcing feasible with knowledgeable specialists.

The A. Schild AS 1191 is a classic automatic movement reflecting Swiss watchmaking precision from the early 20th century. Sourcing quality spare parts is essential to keep these timepieces reliable and authentic for years to come.

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A. Schild (AS) Calibre 1192 Watch Spare Parts: Technical Overview and Sourcing Guide

A. Schild (AS) Calibre 1192 is a vintage Swiss manual-wind mechanical movement, respected for its robust design and reliable performance during the mid-20th century. It is used in a variety of wristwatches and remains a sought-after caliber for collectors and watchmakers restoring vintage timepieces.
Key Technical Highlights

Calibre: AS 1192

Movement Type: Manual wind, mechanical

Size: Approximately 10.5 lignes (about 23.5-24 mm diameter)

Jewels: Typically 17 jewels

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

Power Reserve: Around 40+ hours, depending on condition

Winding Mechanism: Traditional manual winding with yoke system

Shock Protection: Some variants include Incabloc or similar shock protection on the balance wheel, but earlier versions may lack it or have minimal protection

Common Spare Parts Needed

Mainspring and Barrel: Critical for consistent power and timekeeping; fatigued mainsprings or worn barrels typically require replacement to restore functionality.

Balance Wheel and Balance Staff: Fragile and essential for precision; broken or bent balance staffs, or damaged balance wheels, require exact replacements.

Pallet Fork and Escape Wheel: High-wear escapement components that often need servicing or part replacement for smooth operation.

Gear Train Wheels: Minute, third, and fourth wheels can wear or accumulate damage and are replaced with correct AS 1192 parts, often sourced from donor movements.

Stem, Crown, and Setting Components: Worn or bent key components in the setting and winding system require exact spare parts to ensure proper operation.

Jewels: Replacement ruby bearings must match the original jewel count and positioning to maintain movement durability and friction reduction.

Hands and Dial: Period-appropriate hands and dials are essential to preserve authenticity during restoration; often sourced from specialist suppliers or vintage parts.

Sourcing and Service Tips

Donor Movements: Salvaging parts from non-functional AS 1192 movements is a common and reliable method to obtain authentic spares like wheels, escapement parts, and balance assemblies.

New Old Stock (NOS): Some critical parts such as mainsprings, jewels, or winding crowns may be available as NOS from specialist vintage watch part dealers.

Compatibility: While some parts from nearby AS calibers may fit, it is recommended to use parts explicitly for AS 1192 to ensure precision fit and optimal performance.

Careful Handling: Given the mechanical nature and vintage status, delicate components like the balance and escapement require expert watchmaker handling during disassembly and servicing.

Lubrication: Use modern synthetic watch oils sparingly, following vintage watch servicing standards to avoid damage or excessive wear.

Why AS 1192 Spare Parts Matter

Reliability and Performance: Maintaining original-type parts ensures that the movement runs smoothly, retains its power reserve, and keeps accurate time.

Collector Value: Correct restoration using authentic parts preserves the movement’s historical integrity and magnetic appeal for collectors.

Watchmaker Familiarity: AS 1192 is well documented and known in vintage watch servicing communities, facilitating access to technical information and suitable spares.

A. Schild AS 1192 embodies Swiss mid-century mechanical watchmaking excellence. Sourcing quality spare parts is essential for keeping these classic movements functional and true to their original design.

A Schild – AS Calibre 1194 Watch spare parts

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A. Schild (AS) Calibre 1194 Watch Spare Parts: Technical Overview and Sourcing Guide

A. Schild (AS) Calibre 1194 is a vintage Swiss manual-wind mechanical movement introduced in the 1940s. It is known for its robust engineering, reliable performance, and classic design, commonly used in mid-20th-century wristwatches. Proper sourcing of authentic spare parts is vital to maintain its functionality and preserve originality.
Key Technical Highlights

Calibre: AS 1194

Movement Type: Manual wind, mechanical

Diameter: 11.5 lignes (approx. 25.6 mm)

Height: 4.90 mm

Jewels: 17 synthetic ruby jewels

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

Power Reserve: Approximately 43 hours

Lift Angle: 52 degrees (commonly cited)

Functions: Hours, minutes, sweeping central seconds hand

Production Era: Circa 1940s

Hand Sizes: 1.30 mm for hour hand, 0.85 mm for minute hand, 0.22 mm for seconds hand

Common Spare Parts and Service Components

Mainspring and Barrel: Crucial for reliable power delivery; aged mainsprings often fatigue and require precise replacement.

Balance Wheel and Balance Staff: Key to accurate timekeeping, these delicate parts are prone to shock damage and wear. Compatible or original assemblies are recommended.

Pallet Fork and Escape Wheel: Escapement components subject to wear; authentic or well-fitting replacements ensure smooth operation.

Gear Train Wheels: Minute, third, and fourth wheels may require replacement due to tooth or pivot damage; often sourced from donor movements or new-old-stock (NOS).

Stem, Crown, and Setting Mechanism: These components support winding and time-setting and tend to wear out over time; proper fit is necessary.

Jewels: Replacement ruby bearings must match the original to maintain friction reduction and durability.

Hands and Dial: Period-accurate hands and dials preserve watch authenticity during restoration; sourcing may require specialist suppliers.

Sourcing and Maintenance Tips

Donor Movements: Non-working AS 1194 movements are valuable for harvesting hard-to-find parts such as balance assemblies and wheels.

Original and NOS Parts: Prefer spare parts explicitly designed for AS 1194 to ensure compatibility and maintain authenticity.

Handling: The movement has limited or no shock protection; careful handling of balance and escapement parts during servicing is important.

Lubrication: Use high-quality modern synthetic oils sparingly according to vintage watch servicing standards.

Identification: The calibre number is usually stamped on the main plate or near the balance cock—accurate identification ensures correct parts ordering.

Why AS 1194 Spare Parts Matter

Reliability and Precision: Maintaining original or authentic parts preserves the AS 1194’s praised reliability and accurate timekeeping.

Collector Value: Proper restoration with genuine spare parts enhances historical value and functional longevity.

Watchmaker Familiarity: AS 1194 remains a well-regarded vintage movement, supported by knowledgeable watchmakers and a steady parts market.

The A. Schild AS 1194 exemplifies the technical excellence of mid-20th-century Swiss watchmaking. Sourcing quality spare parts is essential for keeping these timepieces authentic, functional, and collectible.

A Schild – AS Calibre 1200 Watch spare parts

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A. Schild (AS) Calibre 1200 Watch Spare Parts: Technical Overview and Sourcing Guide

A. Schild (AS) Calibre 1200 is a vintage Swiss manual-wind mechanical movement produced primarily in the 1950s. It is known for its reliability, compact size, and classic design, often found in mid-century wristwatches. Proper sourcing of compatible and authentic spare parts is essential for maintaining the performance and originality of these movements.
Key Technical Highlights

Calibre: AS 1200

Movement Type: Manual wind, mechanical

Diameter: 10.5 lignes (approx. 23.3 mm)

Height: 3.5 mm

Jewels: Typically 15 (some variants with 17)

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

Power Reserve: Approximately 45 hours

Lift Angle: 52 degrees

Functions: Hours, minutes, small seconds

Production Era: Circa 1950s

Known Variants: Similar calibres include AS 1247, AS 1288, and AS 1317

Common Spare Parts and Service Components

Mainspring and Barrel: Key for power transmission; aged mainsprings often fatigue and need precise replacement to ensure consistent power delivery.

Balance Wheel and Balance Staff: Critical for accurate timekeeping; prone to shock damage and wear, requiring exact matching parts or donor assemblies.

Hairspring: Flat type, essential for regulating beat; often delicate and may require replacement or adjustment.

Pallet Fork and Escape Wheel: Subject to wear from oscillation and should be matched accurately to the AS 1200 for smooth escapement operation.

Wheels (Minute, Third, Fourth): Tooth wear or pivot damage is common; sourcing from donor movements or NOS (new old stock) parts helps maintain precision.

Stem, Crown, and Setting Mechanism: Vital components for manual winding and time setting, which may wear out with age and require exact fittings.

Jewels: Replacement ruby bearings must match jewel count and position to maintain low friction and durability.

Hands and Dials: Period-correct components help preserve authenticity but are often rare and sourced from collectors or specialized suppliers.

Sourcing and Maintenance Tips

Original or NOS Parts: Prioritize parts specifically marked for AS 1200 to ensure compatibility and maintain authenticity.

Donor Movements: Salvaging parts from non-functioning AS 1200 movements is a practical way to source rare components.

Careful Handling: The movement has limited shock protection; handle balance and escapement components with care during servicing.

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

Identification: The AS 1200 calibre number is usually stamped on the movement’s main plate and is essential for correct part identification.

Why AS 1200 Spare Parts Matter

Robust and Reliable Design: Maintaining original parts preserves the movement’s hallmark reliability and precision.

Vintage Authenticity: Correct spare parts help retain historical and collector value of mid-20th-century wristwatches.

Watchmaker Familiarity: AS 1200 enjoys recognition among vintage watchmakers, facilitating repair and maintenance with accessible knowledge and parts networks.

A. Schild AS 1200 is a classic manual-wind caliber that remains a favorite among vintage watch enthusiasts. Access to quality spare parts is essential to keep these mechanical timepieces running authentically and reliably.

A Schild – AS Calibre 1201 Watch spare parts

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A. Schild (AS) Calibre 1201 Watch Spare Parts: Technical Overview and Sourcing Guide

A. Schild (AS) Calibre 1201 is a vintage Swiss manual-wind mechanical movement known for its robust construction, reliable performance, and classic design. Produced primarily in the late 1940s and 1950s, the AS 1201 features a decentralized small seconds display at 6 o’clock, combining precision engineering with traditional aesthetics. It remains popular among collectors and watchmakers specializing in vintage Swiss timepieces.
Key Technical Highlights

Calibre: AS 1201

Size: 11 1/2 lignes (approximately 25.6 mm diameter)

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

Jewels: 17 synthetic ruby jewels, including cap jewels for the escapement wheel

Escapement: Swiss lever pallet

Balance: Screw balance with Incabloc shock protection on both balance pivots

Construction: Solid, high-quality architecture with a classical gear train and bevelled base plate allowing for curved dials and thin cases

Winding Mechanism: Manual, using yoke winding system

Power Reserve: Typically around 40-45 hours (depending on condition)

Distinctive Features: Decentralized small seconds at 6 o’clock; the escapement wheel positioned under the gear train bridge with jeweled bearings for smooth operation

Common Spare Parts and Maintenance Components

Mainspring and Barrel: Frequent replacements due to loss of tension or fatigue; exact dimension matching is vital for power consistency.

Balance Staff and Balance Assembly: Delicate parts prone to shock damage, requiring compatible replacements matched to the Incabloc shock protection system.

Pallet Fork and Escape Wheel: High wear components needing original or precise compatible parts for reliable escapement function.

Wheels (Minute, Third, Fourth): Teeth and pivot wear common; donor movements or new old stock (NOS) parts are typical sources.

Stem, Crown, Setting Lever & Springs: Often show wear with age; compatible AS 1201 parts or direct replacements are necessary for proper winding and time setting.

Jewels: Replacement synthetic ruby bearings critical to reduce friction and maintain smooth gear train operation.

Hands and Dial: Period-correct small seconds hands and dial parts needed for authentic restoration.

Sourcing and Service Tips

Original and NOS Parts: Aim to source parts explicitly labelled for AS 1201 to ensure fit and maintain authenticity.

Donor Movements: Salvage movements often provide the best sources for rare or hard-to-find parts such as gears, escapement components, and balance assemblies.

Handling: The movement’s Incabloc shock protection mitigates some fragility, but careful handling during disassembly and servicing is still crucial.

Lubrication: Use modern synthetic oils sparingly, in line with vintage watch service practices, to preserve movement longevity and performance.

Identification: The calibre number is generally stamped on the main plate or underneath the balance cock, aiding parts ordering accuracy.

Why AS 1201 Spare Parts Matter

Durability and Precision: Using authentic parts helps preserve the movement’s robust reputation and timekeeping accuracy.

Collector and Watchmaker Demand: AS 1201 remains a sought-after caliber for vintage Swiss watches, making quality spare parts vital for maintenance and restorations.

Technical Legacy: Representing mid-20th-century Swiss watchmaking excellence, careful parts sourcing maintains historical and functional integrity.

The A. Schild AS 1201 watch movement is a distinguished example of classic Swiss horology. Proper sourcing and fitting of original or compatible spare parts is essential to keep these iconic mechanical timepieces reliable, authentic, and cherished by collectors and enthusiasts.

A Schild – AS Calibre 1220 Watch spare parts

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A. Schild (AS) Calibre 1220 Watch Spare Parts: Technical Overview and Sourcing Guide

A. Schild (AS) Calibre 1220 is a vintage Swiss manual-wind mechanical movement introduced in the late 1940s. It is recognized for its reliable construction, unique main bridge design, and the modern feature of a directly driven sweep seconds hand. The movement remains popular among collectors and watchmakers restoring vintage wristwatches.
Key Technical Highlights

Calibre: AS 1220

Movement Type: Manual wind, mechanical

Diameter: Approximately 10 1/2 lignes (22.8 to 23.3 mm)

Height: About 4.02 mm

Jewels: 17 synthetic ruby jewels

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

Power Reserve: Around 34 hours

Escapement: Pallet lever type

Balance: Nickel screw balance with counterclockwise hairspring

Shock Protection: Two 3-leg shock protection systems, likely Ruby-Shock type

Winding Mechanism: Yoke winding system on the dial side

Special Features:

Uncommon transmission gear setup after escapement and wheels, possibly due to space constraints

Offset center wheel and modern direct-driven center seconds

Long regulator arm for fine adjustment

Common Spare Parts for AS 1220

Mainspring and Barrel: Essential for power delivery; aged mainsprings often require accurate replacements.

Balance Staff and Balance Assembly: Fragile parts prone to shock damage; matching parts needed for reliable timekeeping.

Pallet Fork and Escape Wheel: Critical escapement parts that wear over time and need original or compatible replacements.

Transmission Wheels (Minute, Third, Fourth): Can suffer wear or damage; donor movements or NOS parts are typical sources.

Stem, Crown, Setting Lever and Springs: Components essential for winding and time setting, often replaced due to wear.

Jewels and Bearings: Maintain low friction and smooth operation; replacement jewels must match original type and placement.

Hands and Dial Components: Period-correct parts help preserve authenticity and proper fit during restoration.

Sourcing and Maintenance Tips

Use original parts marked for AS 1220 or reliable donor movements for best compatibility.

Handle the movement carefully due to shock-sensitive balance and escapement parts.

Employ modern synthetic oils sparingly to maintain lubrication while respecting vintage standards.

Verify dimensions carefully, especially for mainspring and wheels, given some unique transmission design aspects.

The calibre number is stamped on the main plate or under the balance cock for positive identification when ordering parts.

Why AS 1220 Spare Parts Matter

The AS 1220 represents a technically advanced and robust mid-20th-century Swiss manual caliber.

Maintaining authenticity with correct spare parts preserves timekeeping precision, reliability, and collector value.

Its unique construction and direct-drive sweep seconds make it a notable movement within vintage horology circles.

A. Schild AS 1220 remains a valued manual-wind movement, and quality spare parts sourcing is essential for sustaining its legacy in vintage watch repair and restoration.

A Schild – AS Calibre 1130 Watch spare parts

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A. Schild (AS) Calibre 1130 Watch Spare Parts: Technical Overview and Parts Guide

A. Schild (AS) Calibre 1130 is a legendary Swiss manual-wind movement, widely known for powering military, field, and civilian watches—especially German “Wehrmachtswerk” timepieces—in the mid-20th century.
Technical Highlights

Type: Manual wind, sub-second dial at 6 o’clock

Size: 13 lignes (approx. 29.4 mm diameter)

Thickness: 3.8 mm

Jewels: Commonly 17 (may vary 15–21)

Power Reserve: About 41 hours

Beat Rate: 18,000 vph

Shock Protection: Most have none; late samples occasionally have Incabloc or similar

Special Notes: Also called “Wehrmachtswerk” in German military watches; replaced by AS 1188 for direct sweep second
Common Spare Parts and Service Needs

Mainspring:

Dimensions: approx. 1.70–1.75 mm x 0.130–0.135 mm x 340–360 mm x 11.5 mm

Failures include breakage and loss of tension—replace with correct AS 1130 mainspring

Balance Staff:

Must match shock/non-shock variant (dimensions vary with cap-jewel system)

Prone to breakage, especially in models lacking shock protection

Pallet Fork and Arbor:

Torn, bent, or worn teeth and pivots require replacement. Use AS 1130-specific fork

Wheels (Minute, Third, Fourth):

Look for tooth wear, bent pivots, or corrosion; source from donor movements or NOS parts

Escape Wheel:

Especially for non-shock models, check for wear on pivots and teeth.

Barrel and Ratchet Wheel:

Barrel wear may cause power loss; replace or rebush as needed.

Stem, Crown, and Setting Mechanism:

Issue: Detent screw removal can be tricky; use caution to avoid losing spring and click

Hands and Dial:

Sub-seconds hand hole is unique to this calibre; dials are often military-styled, originals are rare and sought after

Jewels:
17 or 21-jewel variants; match for size and placement if replacing separately.

Incabloc/Other Anti-Shock Parts:

Only late and rare; identify presence/absence before ordering.

Sourcing Strategies

Original Parts:

Use only AS 1130-labeled parts due to variations in arbor, mainspring, and wheel sizes

A Schild – AS Calibre 1051 Watch spare parts

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A. Schild (AS) Calibre 1051 Watch Spare Parts: Technical Overview and Sourcing Guide

A. Schild (AS) Calibre 1051 is a vintage Swiss manual-wind movement mainly used in ladies’ watches of the 1940s. Known for its compact, robust design and reliable operation, the AS 1051 requires specialized attention when sourcing genuine spare parts for restoration and maintenance.
Core Technical Highlights

Calibre: AS 1051
Dimensions: 5 3/4 x 8 3/4 lignes
Jewels: 15
Beat Rate: 18,000 A/h
Escapement: Pallet lever, nickel screw balance
Shock Protection: None
Regulation: Long regulator arm
Production Period: Mainly 1940s–1960s
Applications: Ladies’ manual-wind wristwatches

Common Spare Parts Needed

Mainspring:

Typical options include sizes like 1.50 x 0.075 x 280 x 7.5 mm, or minor variants depending on specific production runs
Balance Wheel & Hairspring:

Nickel screw type, vulnerable to shock; original replacements from donor movements are often required.

Pallet Fork & Escape Wheel:

Frequent wear due to absence of shock protection; high-precision Swiss replacements are critical.

Stem, Crown, and Setting Lever:

Setting mechanism components wear with age; spares sometimes sourced from other AS movements of similar size

Wheels (Minute, Third, Fourth):

These can develop damaged teeth or pivots; salvage or new-old-stock (NOS) parts recommended.

Jewels & Bearings:

Proper jewel count is important (typically 15); replacement jewels must be matched for fit and material.

Hands and Dials:

Period-correct spare hands and dials are rarely available new; most restored watches use spares or refinished vintage parts.

Sourcing and Interchangeability

Original AS 1051 Parts: Seek out parts labeled explicitly for AS 1051; many parts are unique due to movement size and construction

Donor Movements: The most common method for sourcing difficult components such as wheels, balance assemblies, or bridges.

Aftermarket Options: Limited for AS 1051, but basic parts like mainsprings and jewels may be available as generics—must check compatibility by precise measurement.

Watchmaker Networks & Collectors: Forums or specialist suppliers dealing in vintage Swiss parts may have limited stock.

Service Tips

Careful Handling: No shock protection—handle balance and escapement assemblies with great care during servicing

Lubrication: Use modern, light oils sparingly; original lubrication standards were minimal.

Identification: The calibre number is marked on the movement, usually under the dial, for proper identification before part ordering

A. Schild AS 1051 exemplifies mid-century Swiss technical excellence in small-form movements. Maintaining authenticity and performance requires careful restoration with period-accurate spare parts sourced either from NOS, donor movements, or specialized vintage suppliers

A Schild – AS Calibre 1001 Watch spare parts

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A. Schild (AS) Calibre 1001 Watch Spare Parts: A Collector’s and Watchmaker’s Guide

A. Schild (AS) calibre 1001 is a vintage Swiss mechanical movement, primarily found in ladies’ wristwatches from the 1940s. Due to its age and historic value, sourcing spare parts requires an understanding of both technical specifications and what typical components may need servicing or replacement.
Key Technical Highlights

Caliber: AS 1001

Diameter: 17.1 mm (7 3/4’’’)

Height: 3.50 mm

Jewels: 7 or 17 (high-grade versions have extensive ruby bearings)

Beat Rate: 18,000 A/h

Escapement: Pallet lever (nickel screw balance)

Shock protection: None (common for the era)

Winding: Manual, yoke winding system

Production Era: 1940s, primarily for small/ladies’ watches

Common Spare Parts for AS 1001

Mainspring and Barrel: Essential for consistent power delivery—prone to fatigue in decades-old movements.

Balance Wheel & Hairspring: Vulnerable to shock and magnetism; can require re-poising or replacement.

Pallet Fork and Escape Wheel: Wear from high-beat rates may necessitate replacement, especially if teeth or pivots are damaged.

Winding and Setting Mechanisms: Includes the yoke, setting lever, and associated springs—frequent sources of wear.

Wheels (Minute, Third, Fourth): Loss of tooth integrity or pivots may call for donor wheels or new-old-stock (NOS) parts.

Jewels: Ruby bearings for the gear train are critical for smooth operation; some export variants have brass bushings instead.

Hands and Dials: Period-correct spares are needed for complete restorations, often custom-fitted or refurbished.

Sourcing & Interchangeability

Original Parts: Look for parts labeled specifically for AS 1001. Due to the small diameter and specific configuration, interchangeability with other A. Schild calibers is limited.

NOS & Donor Movements: Many watchmakers rely on salvaging parts from non-functional AS 1001 movements.

Aftermarket Availability: Some essential components (main springs, jewels) may be available as generic replacements owing to Swiss industry standards of the era, but compatibility should be verified by measurement.

Service Tips

No Shock Protection: Handle balance assemblies with extra care during disassembly to avoid further damage.

Lubrication: Use modern synthetic oils, but with restraint, given the movement’s age and original lubrication standards.

Identification: The caliber number is marked on the dial side, usually requiring dial removal for positive ID

A. Schild AS 1001 remains a testament to mid-century Swiss precision in small-scale movements. Watchmakers and collectors value these for their robust design, but careful sourcing and fitting of correct spare parts is essential to maintain authenticity and function.