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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

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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

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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.