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A. Schild (AS) Calibre 1711 Watch Spare Parts: Technical Overview and Sourcing Guide
A. Schild (AS) Calibre 1711 is a vintage Swiss manual-wind mechanical movement known for its reliable design, sweep seconds hand, and useful date complication. It measures approximately 25.60 mm (11.5 lignes) in diameter, with a height of 4.00 mm. The movement runs at 18,000 vibrations per hour (vph) and typically contains 17 synthetic ruby jewels. The date mechanism is set by changing the time between 20:00 and 24:00, making it a favored calibre for mid-20th-century watch restoration.
Key Technical Highlights
Calibre: AS 1711
Movement Type: Manual winding, mechanical with sweep seconds and date
Diameter: 25.60 mm (11.5 lignes)
Height: 4.00 mm
Jewels: 17 synthetic ruby jewels
Beat Rate: 18,000 vph
Date Function: Set by changing time between 20:00 and 24:00
Shock Protection: Standard vintage anti-shock system (e.g., Incabloc)
Common Spare Parts and Components
Mainspring and Barrel: Must match original specs to ensure steady power delivery and consistent torque.
Balance Wheel and Balance Staff: Delicate precision parts vital for timing accuracy and shock resistance; require exact fit and high-quality replacement.
Pallet Fork and Escape Wheel: Wear-prone escapement components; original or high-quality new-old-stock (NOS) parts are recommended.
Gear Train Wheels (Minute, Third, Fourth): Often replaced due to wear or damage; usually sourced from donor movements or NOS stock.
Setting Mechanism (Stem, Crown, Levers, Springs): Must fit precisely for reliable winding, time, and date setting; winding stems for AS 1711 are commonly available Swiss-made parts.
Jewels: Synthetic ruby bearings arranged to reduce friction; replacements must correspond to original layout and count.
Hands and Dial Components: Period-correct parts help maintain vintage authenticity and collector value.
Sourcing and Maintenance Tips
Use original, NOS, or donor parts clearly marked for AS 1711 to guarantee compatibility and maintain movement integrity.
Handle delicate parts with care during servicing, especially balance wheel, escapement, and date mechanism components.
Apply modern synthetic watch oils sparingly, following vintage lubrication standards to optimize longevity and performance.
Always verify the calibre number stamped on the main plate before ordering parts to avoid compatibility issues.
Donor AS 1711 movements serve as valuable sources for rare components like the date jumper, yoke, and pallet fork.
Why AS 1711 Spare Parts Matter
Authentic spare parts maintain the calibre’s accuracy, reliability, and vintage character, critical for lasting watch function.
Proper restoration with genuine components preserves the historical significance and collector appeal of these classic manual-wind watches.
The well-documented technical details and active vintage watchmaker community support efficient parts sourcing and expert servicing.
Maintaining the A. Schild AS 1711 calibre with quality spare parts ensures these refined vintage manual-wind watches operate reliably and preserves their important place in Swiss horology.