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A. Schild (AS) Calibre 1713 Watch Spare Parts: Technical Overview and Sourcing Guide
A. Schild (AS) Calibre 1713 is a vintage Swiss automatic mechanical movement, known for its reliable automatic winding, sweep seconds, and date complication. It measures approximately 25.60 mm (11.5 lignes) in diameter, with a height of about 5.20 mm, running at 18,000 vibrations per hour (vph). It features 17 or 21 synthetic ruby jewels and is recognized for its durability and smooth functioning, making it a favorite for mid-20th-century watch restoration and servicing.
Key Technical Highlights
Calibre: AS 1713
Movement Type: Automatic, mechanical with sweep seconds and date
Diameter: 25.60 mm (11.5 lignes)
Height: 5.20 mm
Jewels: 17 or 21 synthetic ruby jewels
Beat Rate: 18,000 vph
Power Reserve: Approximately 44 hours
Functions: Hours, minutes, sweep seconds, date (set by time adjustment between 20:00 and 24:00)
Shock Protection: Incabloc or equivalent vintage anti-shock system
Common Spare Parts and Components
Mainspring and Barrel: Responsible for power storage and delivery; replacements must match original specifications for consistent torque and endurance.
Balance Wheel and Balance Staff: Crucial, delicate components requiring exact fit and proper shock protection for accurate timekeeping.
Rotor Assembly and Bearings: Essential for automatic winding; worn bearings or rotor axles should be replaced with precise compatible parts.
Pallet Fork and Escape Wheel: Wear-prone escapement pieces; original or high-quality new-old-stock (NOS) parts ensure smooth and reliable operation.
Gear Train Wheels (Minute, Third, Fourth): Often replaced due to wear or damage; commonly salvaged from donor movements or sourced as NOS.
Setting Mechanism (Stem, Crown, Levers, Springs): Must fit perfectly to support reliable winding, time-setting, and date adjustment. Winding stems for AS 1713 are available as original Swiss-made parts.
Jewels: Synthetic ruby bearings arranged to minimize friction; replacements need to match the original count and layout for efficiency.
Hands and Dial Components: Period-correct parts preserve vintage authenticity and maintain collector value.
Sourcing and Maintenance Tips
Use original, NOS, or donor parts explicitly marked for AS 1713 to ensure compatibility and preserve movement integrity.
Handle fragile components—especially balance wheel, escapement, and rotor assembly—with care during servicing.
Apply modern synthetic watch oils sparingly, following vintage lubrication protocols for longevity and performance.
Always verify the calibre number stamped on the main plate before ordering parts to avoid mismatches.
Donor AS 1713 movements are valuable sources of rare or worn parts including date components, rotor assemblies, and escape parts.
Why AS 1713 Spare Parts Matter
Genuine spare parts maintain the calibre’s accuracy, automatic winding reliability, and longevity, critical for dependable operation.
Proper restoration with authentic components preserves the historical significance and collector appeal of these classic Swiss automatic watches.
The detailed technical documentation and active watchmaker community support facilitate accurate parts sourcing and expert servicing.
Maintaining the A. Schild AS 1713 calibre with high-quality spare parts is essential for ensuring these vintage automatic movements continue to perform reliably and preserve their esteemed place in horological heritage.