A. Schild (AS) Calibre 1876 Watch Spare Parts: Technical Overview and Sourcing Guide
A. Schild (AS) Calibre 1876 is a vintage Swiss automatic mechanical movement prized for its robust construction, reliable performance, and useful complications including sweep seconds, day, and quickset date functions. Manufactured primarily around the mid-20th century, this calibre is a popular choice for collectors and watchmakers restoring classic automatic wristwatches.
Key Technical Highlights
Calibre: AS 1876
Movement Type: Automatic, mechanical
Diameter: 25.60 mm (11.5 lignes)
Height: 4.70 mm
Jewels: 17, 21, 25, or 26 synthetic ruby jewels (varies by version)
Beat Rate: 21,600 vibrations per hour (vph)
Power Reserve: Around 42 hours
Functions: Hours, minutes, sweep seconds, day (set by ±24 hours), date (quickset by repeated crown pushing)
Shock Protection: Vintage anti-shock system (commonly Incabloc)
Rotor: Ball-bearing mechanism for smooth automatic winding
Lift Angle: Approximately 52°
Common Spare Parts and Components
Mainspring and Barrel: Ensure steady and durable power delivery; original or NOS mainsprings recommended for correct torque and longevity.
Balance Wheel and Balance Staff: Precision components essential for chronometric accuracy and shock resistance; exact fitting parts ensure reliable operation.
Rotor Assembly and Bearings: Integral to automatic winding efficiency; replace worn rotors and bearings with genuine or high-quality NOS parts for smooth performance.
Pallet Fork and Escape Wheel: Wear-prone escapement parts; sourcing original or NOS components safeguards smooth operation.
Gear Train Wheels (Minute, Third, Fourth): Often replaced due to wear; typically harvested from donor movements or NOS stock.
Setting Mechanism Parts (Stem, Crown, Levers, Springs): Accurate fitting parts allow smooth winding, day setting, and quickset date functions.
Jewels: Synthetic ruby bearings positioned to reduce friction; replacements must match the original layout to maintain movement integrity.
Hands and Dial Components: Period-correct parts help preserve vintage authenticity and collector appeal.
Sourcing and Maintenance Tips
Always use original, NOS, or compatible donor parts marked specifically for AS 1876 to ensure precise fit and preserve movement quality.
Handle delicate components such as balance assemblies and escapement parts carefully during servicing to prevent damage.
Apply modern synthetic watch oils sparingly, adhering to vintage lubrication standards for optimal longevity and performance.
Confirm the calibre number stamped on the main plate before ordering parts to avoid incompatibilities.
Donor AS 1876 movements are valuable sources for rare or worn components.
Why AS 1876 Spare Parts Matter
Genuine spare parts maintain the calibre’s accuracy, reliability, and efficient automatic winding, essential for dependable daily wear.
Proper restoration with authentic components preserves the historical significance and collector value of these classic Swiss automatic wristwatches.
Detailed technical documentation and an active watchmaker community facilitate efficient parts sourcing and expert servicing.
Maintaining the A. Schild AS 1876 calibre with high-quality, authentic spare parts ensures these vintage automatic movements continue to run smoothly while preserving their rightful place in Swiss horology heritage.
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Stem, Crown, Hands & Spares might be available for this movement.
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