A. Schild (AS) Calibre 1893 Watch Spare Parts: Technical Overview and Sourcing Guide
A. Schild (AS) Calibre 1893 is a vintage Swiss automatic mechanical movement recognized for its reliable performance, practical complications, and robust construction. Produced as part of the AS calibre series, it boasts a classic automatic winding system with day and date functions, making it a popular choice for mid-20th-century wristwatches.
Key Technical Highlights
Calibre: AS 1893
Movement Type: Automatic, mechanical
Diameter: 26 mm (11.5 lignes)
Jewels: 17, 21, or 25 synthetic ruby jewels
Beat Rate: 21,600 vibrations per hour (vph)
Power Reserve: Approximately 42 hours
Lift Angle: 52°
Functions: Hours, minutes, sweep seconds, day and date complications (typically with quickset function)
Shock Protection: Vintage Incabloc or equivalent anti-shock system
Rotor: Ball-bearing type for smooth and efficient automatic winding
Common Spare Parts and Components
Mainspring and Barrel: Vital for consistent power delivery; original or new-old-stock (NOS) mainsprings recommended for correct torque and durability.
Balance Wheel and Balance Staff: Precision parts essential for accurate timekeeping and shock resistance; must be precisely matched to the calibre.
Rotor Assembly and Bearings: Central to efficient automatic winding; worn or damaged rotors and bearings should be replaced with genuine or quality NOS parts.
Pallet Fork and Escape Wheel: Escapement parts prone to wear; sourcing original or NOS parts maintains smooth and reliable movement operation.
Gear Train Wheels (Minute, Third, Fourth): Commonly replaced due to wear or damage; generally sourced from donor movements or quality NOS stock.
Setting Mechanism (Stem, Crown, Levers, Springs): Precise fitting parts ensure smooth winding, time setting, and calendar adjustments. Compatible winding stems such as Swiss made Part No. 401 often fit this calibre.
Jewels: Synthetic ruby bearings arranged to minimize friction; replacements must correspond exactly to the original layout.
Hands and Dial Components: Period-correct parts help maintain vintage authenticity and add collector appeal.
Sourcing and Maintenance Tips
Always use original, NOS, or donor parts specifically designated for AS 1893 to ensure full compatibility and preserve movement quality.
Handle delicate parts such as the balance assembly, escapement, and rotor with care to prevent damage during servicing.
Apply modern synthetic watch oils sparingly, adhering to vintage lubrication practices to optimize movement longevity and function.
Verify the calibre number stamped on the movement main plate before ordering to avoid incompatibilities.
Donor AS 1893 movements serve as valuable sources for rare, high-quality, or worn components.
Why AS 1893 Spare Parts Matter
Authentic spare parts maintain the calibre’s accuracy, reliable automatic winding, and durability, crucial for dependable vintage watch performance.
Proper restoration with genuine components helps preserve the historical significance and collector value of classic Swiss automatic wristwatches.
Detailed technical documentation and an active watchmaker community facilitate efficient sourcing and expert servicing.
Maintaining the A. Schild AS 1893 calibre with quality spare parts is essential for ensuring these vintage automatics continue to run smoothly while respecting their place in Swiss horological history.
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Stem, Crown, Hands & Spares might be available for this movement.
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