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A. Schild (AS) Calibre 1700 Watch Spare Parts: Technical Overview and Sourcing Guide
A. Schild (AS) Calibre 1700 is a vintage Swiss automatic mechanical movement, known for its robust design, reliable automatic winding, and classic 3-hand time display without a date function. Produced since at least 1965, it measures 25.6 mm in diameter (11.5 lignes) and has a height of about 5.20–5.25 mm. It typically contains 17, 21, 25, or even 30 jewels and runs at a beat rate of 18,000 vibrations per hour (vph), with a power reserve of approximately 40 hours. It incorporates an Incabloc anti-shock device and is hand-windable with a regulator.
Key Technical Highlights
Calibre: AS 1700
Movement Type: Automatic, self-winding mechanical
Diameter: 25.6 mm (11.5 lignes)
Height: ~5.20 to 5.25 mm
Jewels: 17, 21, 25, or 30 (varies by version)
Beat Rate: 18,000 vph
Power Reserve: ~40 hours
Shock Protection: Incabloc or equivalent
Functions: Central hours, central minutes, central sweeping seconds (no date)
Hand-windable: Yes
Regulator: Yes
Common Spare Parts and Components
Mainspring and Barrel: For consistent power delivery; parts must match original torque and size specifications.
Balance Wheel and Balance Staff: Precision components driving time accuracy and shock absorption; exact replacements required.
Rotor Assembly and Bearings: Key parts for automatic winding efficiency; worn bearings/axles need precise replacements.
Pallet Fork and Escape Wheel: Wear-prone escapement parts; sourcing original or high-quality new-old-stock (NOS) ensures smooth function.
Gear Train Wheels (Minute, Third, Fourth): Often replaced due to wear; typically sourced from donor movements or NOS stock.
Setting Mechanism (Stem, Crown, Levers, Springs): Must fit precisely to guarantee reliable winding and time adjustment.
Jewels: Synthetic ruby bearings positioned to reduce friction; replacements must match 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 clearly marked for AS 1700 to ensure compatibility and retain movement integrity.
Handle delicate parts like the balance and rotor assemblies with care during servicing.
Apply modern synthetic watch oils sparingly, adhering to vintage lubrication standards for durability and performance.
Always verify the calibre number stamped on the main plate before ordering spare parts to avoid mismatches.
Donor movements provide valuable source parts for hard-to-find or worn components.
Why AS 1700 Spare Parts Matter
Genuine parts maintain the calibre’s accuracy, automatic winding reliability, and mechanical longevity.
Proper servicing with authentic components preserves the historical significance and collectible nature of these classic Swiss automatic watches.
The detailed technical documentation facilitates parts sourcing and expert servicing among vintage watchmakers.
Maintaining the A. Schild AS 1700 calibre with quality spare parts is essential to ensure these robust automatic movements continue to operate reliably while preserving their place in Swiss horological heritage.