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A. Schild (AS) Calibre 1475 Watch Spare Parts: Technical Overview and Sourcing Guide
A. Schild (AS) Calibre 1475 is a vintage Swiss manual-wind mechanical movement produced between 1954 and 1974, renowned for its robust build and integrated alarm complication. It remains a classic choice for collectors and watchmakers restoring mid-20th-century wristwatches with alarm functions.
Key Technical Highlights
Calibre: AS 1475
Movement Type: Manual wind, mechanical with alarm
Diameter: 25.6 mm (11.5 lignes)
Height: 5.75 mm
Jewels: 17 synthetic ruby jewels
Beat Rate: 18,000 vibrations per hour (vph)
Power Reserve: Approximately 46 hours
Functions: Hours, minutes, central seconds, 12-second alarm
Special Features: Two-barrel system (one for alarm, one for timekeeping), two crowns (one for winding/time-setting, one for alarm winding/setting)
Production Period: 1954–1974
Notable Models: Widely used in many vintage watches including brands like Buren, Tissot, Benrus, Bulova, and Girard Perregaux
Common Spare Parts and Service Components
Mainspring and Barrel: Two barrels require separate mainsprings; originals or precise replacements are critical for power and alarm function reliability.
Balance Wheel and Balance Staff: Essential for time accuracy; fragile parts that require correct sizing and shock protection compatibility.
Alarm Mechanism Components: Alarm spring, hammer, and other specialized alarm parts require exact matching for proper function.
Rotor and Automatic Components: N/A (manual wind movement)
Pallet Fork and Escape Wheel: Key escapement parts that wear over time and should be replaced with original or NOS parts.
Wheels (Minute, Third, Fourth): Wear-prone gear train wheels often sourced from donor movements or new-old-stock (NOS).
Stems and Crowns: Two distinct stems and crowns exist for alarm and time functions; exact counterparts necessary for reliable operation and setting.
Jewels: Replacement synthetic ruby bearings must match original count and placement for smooth operation.
Hands and Dial: Period-appropriate hands and dials keep restoration authentic and visually correct.
Sourcing and Maintenance Tips
Prioritize original or NOS spare parts specifically marked for AS 1475 to ensure proper fit and functionality.
Salvage donor movements for rare or worn alarm-specific components.
Handle alarm and time-setting assemblies carefully due to their complexity and the dual-crown interface.
Use modern synthetic lubricants sparingly, following traditional vintage watch maintenance guidelines.
Confirm the calibre number stamped on the main plate before ordering parts for compatibility.
Why AS 1475 Spare Parts Matter
Ensuring Reliability: Authentic parts guarantee consistent timekeeping and alarm functionality.
Maintaining Collector Value: Correct parts uphold the historical integrity and market appeal of vintage alarm watches.
Supporting Repairability: The AS 1475 remains one of the most widely produced and recognized vintage Swiss alarm movements, with robust documentation and enthusiast support.
Proper sourcing and servicing of spare parts keep the A. Schild AS 1475 a reliable and authentic mechanical alarm watch movement, preserving its legacy in Swiss horology.