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A. Schild (AS) Calibre 1701 Watch Spare Parts: Technical Overview and Sourcing Guide
A. Schild (AS) Calibre 1701 is a vintage Swiss automatic mechanical movement known for its robust design, reliable automatic winding, and useful date complication. It has been produced since the early 1960s and is prized by collectors and watchmakers restoring mid-20th-century automatic wristwatches.
Key Technical Highlights
Calibre: AS 1701
Movement Type: Automatic, self-winding mechanical
Diameter: 25.60 mm (11.5 lignes)
Height: Approximately 5.25 mm
Jewels: 17, 21, 25 or 30 synthetic ruby jewels, depending on version
Beat Rate: 18,000 vibrations per hour (vph)
Power Reserve: Around 41 hours
Lift Angle: 52 degrees
Functions: Hours, minutes, central sweep seconds, date (set by changing time between 20:50 and midnight)
Shock Protection: Incabloc or equivalent anti-shock system
Features: Automatic winding with oscillating weight; hairspring key adjustment
Common Spare Parts and Components
Mainspring and Barrel: Critical for energy storage and consistent torque; replacement parts must match original specifications.
Balance Wheel and Balance Staff: Precision and delicate; exact fit and compatible with shock protection are essential for accurate timekeeping.
Rotor Assembly and Bearings: Vital for automatic winding efficiency; worn components require precise replacement for smooth motion.
Pallet Fork and Escape Wheel: Wear-prone escapement components; high-quality original or NOS parts ensure reliable operation.
Gear Train Wheels: Minute, third, fourth wheels that may suffer wear or pivot damage; commonly sourced from donor movements or NOS stock.
Setting Mechanism (Stem, Crown, Levers, Springs): Precise fitting required for reliable winding, time, and date setting.
Jewels: Synthetic ruby bearings positioned to reduce friction; replacements must correspond to original number and layout.
Hands and Dial Components: Period-correct parts preserve vintage authenticity and enhance collector appeal.
Sourcing and Maintenance Tips
Prioritize original, NOS, or donor parts specifically marked for AS 1701 to guarantee compatibility and maintain movement integrity.
Handle fragile components, especially the balance wheel and rotor assemblies, with care during servicing.
Use modern synthetic watch oils sparingly, following vintage lubrication practices to extend movement longevity.
Always verify the calibre number stamped on the main plate before ordering parts to avoid incompatibility.
Donor movements are valuable for sourcing rare or worn components.
Why AS 1701 Spare Parts Matter
Authentic parts preserve the calibre’s accuracy, reliability, and mechanical durability, crucial for maintaining watch performance.
Proper servicing with genuine components safeguards the historical integrity and collector value of these classic Swiss automatic watches.
Detailed technical documentation and a supportive watchmaker community facilitate efficient parts sourcing and expert repairs.
Maintaining the A. Schild AS 1701 calibre with quality spare parts ensures reliable operation of these vintage automatic movements, preserving their legacy in Swiss horology.