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A. Schild (AS) Calibre 1705 Watch Spare Parts: Technical Overview and Sourcing Guide
A. Schild (AS) Calibre 1705 is a vintage Swiss manual-wind mechanical movement prized for its reliability and useful date complication with sweep seconds. It features a diameter of approximately 25.60 mm (11.5 lignes) and a slim profile with a height of about 3.80 mm. This calibre commonly contains 17 synthetic ruby jewels and operates at a beat rate of 18,000 vibrations per hour (vph). The date function is set by changing the time between 20:30 and midnight, a typical feature in vintage manual movements.
Key Technical Highlights
Calibre: AS 1705
Movement Type: Manual winding, mechanical
Diameter: 25.60 mm (11.5 lignes)
Height: 3.80 mm
Jewels: 17 synthetic ruby jewels
Beat Rate: 18,000 vibrations per hour (vph)
Functions: Hours, minutes, sweep seconds, date complication
Date Setting: By changing time between 20:30 and 24:00
Shock Protection: Standard vintage anti-shock system
Vintage Era: Mid-20th century
Common Spare Parts and Components
Mainspring and Barrel: Essential for stable power delivery; replacement mainsprings must match original specs to maintain torque and duration.
Balance Wheel and Balance Staff: Precision components vital for accurate timekeeping and shock resistance; require exact fit and compatible shock protection.
Pallet Fork and Escape Wheel: Wear-prone escapement parts where sourcing original or high-quality new-old-stock (NOS) replacements is important for smooth operation.
Gear Train Wheels (Minute, Third, Fourth): Typically replaced due to wear; parts commonly sourced from donor movements or NOS stock.
Setting Mechanism (Stem, Crown, Levers, Springs): Must fit precisely to ensure reliable winding, time-setting, and date adjustment.
Jewels: Synthetic ruby bearings designed to reduce friction; replacements should match original placement and count for durability.
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 1705 to ensure compatibility and maintain movement integrity.
Handle delicate parts such as balance wheel and escapement with care during servicing to prevent damage.
Apply modern synthetic watch oils sparingly, following vintage lubrication guidelines to optimize movement longevity and performance.
Always verify the calibre number stamped on the main plate before ordering parts to avoid incompatibility.
Why AS 1705 Spare Parts Matter
Authentic parts preserve the calibre’s accuracy, reliability, and vintage character, essential for well-functioning restorations.
Proper servicing with genuine components helps maintain the historical significance and collector appeal of these classic Swiss manual-wind watches.
The documented design and community knowledge support efficient parts sourcing and expert repairs.
Maintaining the A. Schild AS 1705 calibre with quality spare parts is crucial to keep these vintage manual-wind watches operating smoothly and preserving their respected Swiss horological heritage.