A. Schild (AS) Calibre 1913 Watch Spare Parts: Technical Overview and Sourcing Guide
A. Schild (AS) Calibre 1913 is a vintage Swiss automatic mechanical movement celebrated for its reliability, efficient automatic winding, and practical complications including sweep seconds and a date function with quickset by changing time between 20:00 and 24:00. Produced primarily in the late 1950s to early 1960s, it remains a favored choice for collectors and watchmakers restoring classic wristwatches.
Key Technical Highlights
Calibre: AS 1913
Movement Type: Automatic, mechanical with sweep seconds
Diameter: 25.60 mm (11.5 lignes)
Height: 5.20 mm
Jewels: 17, 21, or 25 synthetic ruby jewels
Beat Rate: 21,600 vibrations per hour (3 Hz)
Power Reserve: Approximately 44 hours
Functions: Hours, minutes, sweep seconds, date with quickset (via crown position/time change between 20:00-24:00)
Shock Protection: Vintage anti-shock system (e.g., Incabloc)
Lift Angle: Approximately 52°
Common Spare Parts and Components
Mainspring and Barrel: Original or new-old-stock (NOS) mainsprings recommended for stable torque and reliable power delivery.
Balance Wheel and Balance Staff: Precision components demanding exact fit for accurate timekeeping and shock resistance.
Rotor Assembly and Bearings: Essential for smooth automatic winding; worn parts require genuine or NOS replacements.
Pallet Fork and Escape Wheel: Wear-prone escapement parts; sourcing authentic components ensures smooth operation.
Gear Train Wheels (Minute, Third, Fourth): Commonly replaced due to wear; typically obtained from donor movements or NOS stock.
Setting Mechanism (Stem, Crown, Levers, Springs): Precisely fitted parts vital for smooth winding, time setting, and date adjustment; winding stems such as Part No. 401 are often compatible.
Jewels: Synthetic ruby bearings arranged to minimize friction; must correspond exactly to the original layout to maintain movement integrity.
Hands and Dial Components: Period-correct parts uphold vintage authenticity and increase collector appeal.
Date Mechanism Components: Including date jumper, dial guard, and unlocking yoke crucial for reliable date function.
Sourcing and Maintenance Tips
Use only original, NOS, or donor parts specifically designated for AS 1913 to guarantee compatibility and preserve movement quality.
Handle delicate components—especially balance assemblies, escapement, and rotor—with care during servicing to prevent damage.
Apply modern synthetic watch oils sparingly, following vintage lubrication standards for longevity and optimal performance.
Always verify the calibre number stamped on the main plate before ordering to avoid mismatches.
Donor AS 1913 movements are valuable sources for rare or worn components.
Why AS 1913 Spare Parts Matter
Genuine parts preserve the calibre’s accuracy, reliable automatic winding, and durable mechanical performance, critical for dependable vintage watch operation.
Proper restoration with authentic components upholds the historical significance and collector value of these classic Swiss automatic watches.
Detailed technical documentation and an active watchmaker community facilitate expert servicing and efficient parts sourcing.
Maintaining the A. Schild AS 1913 calibre with high-quality, authentic spare parts ensures these beautiful vintage automatics continue to operate reliably while honoring their place in Swiss horological heritage.
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Stem, Crown, Hands & Spares might be available for this movement.
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