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A. Schild (AS) Calibre 1824 Watch Spare Parts: Technical Overview and Sourcing Guide
A. Schild (AS) Calibre 1824 is a robust vintage Swiss automatic movement, prized for its reliability, mid-century engineering, and versatility found in classic wristwatches of the 1960s and 1970s. Servicing this movement demands precise, authentic parts and careful handling to preserve its integrity.
Key Technical Highlights
Calibre: AS 1824
Movement Type: Automatic, mechanical
Diameter: 11.5 lignes (approx. 26mm)
Height: About 5.25mm
Jewels: 17, 21, or 25 synthetic ruby jewels
Beat Rate: 18,000 vibrations per hour (vph)
Power Reserve: Approx. 42 hours
Functions: Hours, minutes, sweep seconds, quickset date, hacking seconds (depending on execution)
Shock Protection: Vintage anti-shock system, typical for period Swiss automatics
Common Spare Parts and Components
Mainspring and Barrel: Stable power delivery is essential—use NOS (new old stock) or original mainsprings for optimal performance.
Balance Wheel and Balance Staff: Precision components that require exact fit for proper timekeeping and shock resistance.
Rotor Assembly and Bearings: Critical for seamless automatic winding; worn rotors or bearings should be replaced with genuine or high-quality NOS elements.
Pallet Fork and Escape Wheel: Escapement wear is common; original or NOS replacements ensure durability.
Gear Train Wheels (Minute, Third, Fourth): Often replaced due to wear; typically sourced from donor movements or NOS stock.
Barrel Arbor (Part No. 195): Essential for mainspring operation and must fit the calibre exactly.
Setting Mechanism (Stem, Crown, Levers, Springs): Must be matched for reliable winding, time setting, and quickset operations.
Jewels: Synthetic rubies reduce friction and must match the original layout.
Hands and Dial Components: Period-appropriate spares maintain authentic look and vintage value.
Sourcing and Maintenance Tips
Use only original, NOS, or properly marked donor parts for calibre 1824 to ensure compatibility and optimize movement durability.
Handle delicate components (balance, escapement, rotor) with care to avoid damage during servicing.
Apply modern synthetic watch oils sparingly, using protocols suited for vintage watches.
Always confirm the calibre number on the main plate before ordering any parts to eliminate compatibility errors.
Donor AS 1824 movements are valuable resources for rare or worn spare parts.
Why AS 1824 Spare Parts Matter
Authentic parts ensure the calibre’s precision, automatic winding efficiency, and mechanical durability.
Restoring with the correct parts preserves the historical and collectible appeal of classic Swiss automatic watches.
Comprehensive technical documentation and an active community aid efficient parts sourcing and expert repairs.
Maintaining the A. Schild AS 1824 movement with quality, authentic spare parts is essential for reliable performance and honoring Swiss horological history.