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A. Schild (AS) Calibre 1782 Watch Spare Parts: Technical Overview and Sourcing Guide
A. Schild (AS) Calibre 1782 is a vintage Swiss automatic mechanical movement known for its reliability, compact size, and classic features. It measures approximately 8.75 lignes (19.4 mm) in diameter with a height of about 4.9 mm. The calibre typically contains 17 or 21 synthetic ruby jewels, operates at a beat rate of 18,000 vibrations per hour (vph), and offers a power reserve of around 38 hours. This calibre is well-regarded for its sweep seconds and automatic winding efficiency.
Key Technical Highlights
Calibre: AS 1782
Movement Type: Automatic, mechanical
Diameter: 19.4 mm (8.75 lignes)
Height: 4.9 mm
Jewels: 17 or 21 synthetic ruby jewels
Beat Rate: 18,000 vph
Power Reserve: Approximately 38 hours
Functions: Hours, minutes, sweep seconds, automatic winding
Shock Protection: Standard vintage anti-shock system with a lift angle of 52°
Common Spare Parts and Components
Mainspring and Barrel: Critical for providing stable power delivery; replacements must match original specifications for consistent torque and reliability.
Balance Wheel and Balance Staff: Delicate, precision parts essential for accuracy and shock absorption; require exact fitment and quality compatible replacements.
Rotor Assembly and Bearings: Key to smooth automatic winding; worn rotor parts and bearings should be replaced with original or high-quality new-old-stock (NOS) components.
Pallet Fork and Escape Wheel: Wear-prone escapement parts; sourcing genuine or NOS pieces ensures smooth and reliable movement operation.
Gear Train Wheels (Minute, Third, Fourth): Often replaced due to wear or damage; typically sourced from donor movements or NOS stock.
Setting Mechanism (Stem, Crown, Levers, Springs): Must fit precisely to maintain reliable winding, time setting, and hand adjustment functions.
Jewels: Synthetic ruby bearings designed to reduce friction; replacements must match the original configuration to preserve movement integrity.
Hands and Dial Components: Period-correct parts preserve vintage authenticity and collector value.
Sourcing and Maintenance Tips
Use original, NOS, or donor parts clearly marked for AS 1782 to guarantee perfect compatibility and maintain movement quality.
Handle delicate components like the balance wheel, rotor assembly, and escapement carefully during servicing.
Apply modern synthetic watch oils sparingly, adhering to vintage lubrication standards for longevity and optimal performance.
Always verify the calibre number stamped on the main plate before ordering parts to avoid mismatches.
Donor AS 1782 movements can be valuable sources for rare or worn components.
Why AS 1782 Spare Parts Matter
Genuine parts ensure the calibre’s accuracy, reliability, and automatic winding efficiency, crucial for dependable performance.
Proper servicing with authentic components helps maintain the historical significance and collector appeal of these classic Swiss automatic movements.
The well-documented technical design and active watchmaker community facilitate reliable parts sourcing and expert repair.
Maintaining the A. Schild AS 1782 calibre with quality spare parts is essential for keeping these refined vintage automatic watches running smoothly and preserving their important place in Swiss horology.