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A. Schild (AS) Calibre 1826 Watch Spare Parts: Technical Overview and Sourcing Guide
A. Schild (AS) Calibre 1826 is a vintage Swiss automatic mechanical movement renowned for its reliable performance and classic day/date complications. Commonly found in mid-20th-century wristwatches, it features a robust build and efficient automatic winding mechanism, making it highly valued by collectors and watchmakers.
Key Technical Highlights
Calibre: AS 1826
Movement Type: Automatic, mechanical
Diameter: 25.60 mm (11.5 lignes)
Height: 5.25 mm
Jewels: 17, 21, or 25 synthetic ruby jewels
Beat Rate: 18,000 vibrations per hour (vph)
Power Reserve: Approximately 42 hours
Functions: Hours, minutes, sweep seconds, day, and date (date set by changing time between 20:20 and midnight)
Shock Protection: Standard vintage Incabloc or equivalent anti-shock system
Rotor: Ball-bearing type for smooth automatic winding
Common Spare Parts and Components
Mainspring and Barrel: Critical for consistent power transmission; original or new-old-stock (NOS) mainsprings are preferred for durability and proper torque.
Balance Wheel and Balance Staff: Precision parts essential for accurate timekeeping and shock absorption; must be exact fits for reliable performance.
Rotor Assembly and Bearings: Key to automatic winding efficiency; worn or damaged components should be replaced with genuine or NOS pieces to maintain smooth operation.
Pallet Fork and Escape Wheel: Wear-prone escapement parts; sourcing original or high-quality NOS parts ensures smooth and reliable movement.
Gear Train Wheels (Minute, Third, Fourth): Frequently replaced due to usage wear; typically sourced from donor movements or NOS stock.
Setting Mechanism (Stem, Crown, Levers, Springs): Precise fitting parts necessary for smooth winding, time, day, and date settings. Winding stems such as Part No. 401 may be compatible.
Jewels: Synthetic ruby bearings arranged to reduce friction; replacements must precisely match the original layout.
Hands and Dial Components: Period-appropriate parts maintain vintage authenticity and add collector value.
Sourcing and Maintenance Tips
Use original, NOS, or marked donor parts specifically for AS 1826 to ensure compatibility and movement integrity.
Handle delicate components, especially balance assemblies, escapement parts, and rotor, with great care during servicing.
Apply modern synthetic watch oils sparingly and according to vintage lubrication standards to maintain longevity and optimal functionality.
Always verify the calibre number stamped on the movement main plate before ordering to avoid mismatches.
Donor AS 1826 movements are valuable sources for rare, worn, or hard-to-find spare parts.
Why AS 1826 Spare Parts Matter
Authentic parts help preserve the calibre’s accuracy, reliability, and efficient automatic winding, crucial for everyday dependable wear.
Proper restoration with genuine components supports the historical significance and collector appeal of this classic Swiss automatic movement.
The detailed technical documentation and an active watchmaker community facilitate reliable parts sourcing and expert servicing.
Maintaining the A. Schild AS 1826 calibre with quality, authentic spare parts ensures these vintage automatics continue running smoothly while honoring their heritage in Swiss horology.