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A. Schild (AS) Calibre 1716 Watch Spare Parts: Technical Overview and Sourcing Guide
A. Schild (AS) Calibre 1716 is a vintage Swiss automatic mechanical movement known for its reliable automatic winding, sweep seconds feature, and robust construction. It measures approximately 25.60 mm (11.5 lignes) in diameter, with a height of about 4.10 mm. This calibre typically contains 17, 21, or 25 synthetic ruby jewels, runs at a beat rate of 18,000 vibrations per hour (vph), and offers a power reserve of around 42 hours.
Key Technical Highlights
Calibre: AS 1716
Movement Type: Automatic, self-winding mechanical
Diameter: 25.60 mm (11.5 lignes)
Height: Approximately 4.10 mm
Jewels: 17, 21, or 25 synthetic ruby jewels (varies by version)
Beat Rate: 18,000 vph
Power Reserve: About 42 hours
Functions: Hours, minutes, sweep seconds, automatic winding
Shock Protection: Incabloc or equivalent anti-shock system
Common Spare Parts and Components
Mainspring and Barrel: Critical for stable power storage and consistent torque; replacements must match original specs.
Balance Wheel and Balance Staff: Delicate precision components essential for accurate timing and shock resistance; require exact fitment and quality parts.
Rotor Assembly and Bearings: Key to efficient automatic winding; worn bearings or rotor axles need precise compatible replacements.
Pallet Fork and Escape Wheel: Wear-prone escapement parts; original or high-quality new-old-stock (NOS) components ensure smooth operation.
Gear Train Wheels (Minute, Third, Fourth): Commonly replaced due to wear; typically sourced from donor movements or NOS stock.
Setting Mechanism (Stem, Crown, Levers, Springs): Must fit perfectly to guarantee reliable winding and time setting functionality.
Jewels: Synthetic ruby bearings arranged to reduce friction; replacements must correspond to the original count and placement.
Hands and Dial Components: Period-correct parts preserve vintage authenticity and collector value.
Sourcing and Maintenance Tips
Use original, NOS, or donor parts specifically marked for AS 1716 to ensure compatibility and maintain movement integrity.
Handle fragile components, notably the balance wheel and rotor assembly, with care during servicing.
Apply modern synthetic watch oils sparingly, following vintage lubrication standards to maximize movement longevity.
Always verify the calibre number stamped on the main plate before ordering to avoid parts mismatch.
Donor movements provide valuable sources for hard-to-find or worn components.
Why AS 1716 Spare Parts Matter
Authentic parts preserve the calibre’s accuracy, automatic winding efficiency, and mechanical durability.
Proper restoration with genuine components maintains the historical importance and collector appeal of these classic Swiss automatic movements.
The detailed technical documentation and active watchmaker community support enable reliable parts sourcing and expert servicing.
Maintaining the A. Schild AS 1716 calibre with quality spare parts is essential for ensuring these vintage automatic watches continue to perform reliably and retain their respected place in Swiss horology history.