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A. Schild (AS) Calibre 1767 Watch Spare Parts: Technical Overview and Sourcing Guide
A. Schild (AS) Calibre 1767 is a vintage Swiss automatic mechanical movement distinguished by its robust automatic winding system, sweep seconds hand, and dual calendar functions featuring day and date complications. This calibre, measuring 25.60 mm (11.5 lignes) in diameter with a height of approximately 5.85 mm, runs at a beat rate of 18,000 vibrations per hour (vph) and commonly features 17 or 21 synthetic ruby jewels. It offers a power reserve of about 41 hours, making it a reliable choice for mid-20th-century gentleman’s watches.
Key Technical Highlights
Calibre: AS 1767
Movement Type: Automatic, mechanical
Diameter: 25.60 mm (11.5 lignes)
Height: 5.85 mm
Jewels: 17 or 21 synthetic ruby jewels
Beat Rate: 18,000 vph
Power Reserve: About 41 hours
Functions: Hours, minutes, sweep seconds, day (set +/- 24h), date (set by changing time between 20:30 and 24:00)
Shock Protection: Vintage systems such as Incabloc
Notable: Ball-bearing rotor for smooth automatic winding
Common Spare Parts and Components
Mainspring and Barrel: Must match original specifications for reliable torque and power reserve. NOS replacement parts often available.
Balance Wheel and Balance Staff: Precision parts requiring exact fitment and shock protection for accurate timekeeping.
Rotor Assembly and Bearings: Critical for efficient automatic winding; worn parts should be replaced with quality or NOS components.
Pallet Fork and Escape Wheel: Wear-prone escapement parts; sourcing original or high-grade NOS ensures smooth function.
Gear Train Wheels (Minute, Third, Fourth): Typically replaced due to wear; sourced from donor movements or NOS stock.
Setting Mechanism (Stem, Crown, Levers, Springs): Must fit perfectly for smooth winding, time, and calendar adjustments. Original Swiss-made winding stems available.
Jewels: Synthetic ruby bearings arranged to minimize friction; replacements must match original layout and number.
Hands and Dial Components: Period-correct parts preserve vintage authenticity and collector appeal.
Sourcing and Maintenance Tips
Use original, NOS, or donor parts explicitly marked for AS 1767 to ensure compatibility and maintain movement integrity.
Handle delicate components, especially the balance wheel and rotor assembly, with care during servicing.
Apply modern synthetic watch oils sparingly, following vintage lubrication standards to optimize longevity and performance.
Always verify the calibre number stamped on the main plate before ordering parts.
Donor AS 1767 movements can be valuable sources for rare or worn components.
Why AS 1767 Spare Parts Matter
Authentic parts maintain the calibre’s accuracy, automatic winding reliability, and mechanical durability, crucial for dependable operation.
Proper restoration with genuine components preserves the historical significance and collector appeal of these classic Swiss automatic watches.
The detailed technical documentation and active watchmaker community facilitate efficient parts sourcing and expert servicing.
Maintaining the A. Schild AS 1767 calibre with quality spare parts is essential to ensure these distinguished vintage automatic wristwatches continue to perform reliably and retain their prestigious place in horological history.