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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.