A. Schild (AS) Calibre 1930 Watch Spare Parts: Technical Overview and Sourcing Guide
A. Schild (AS) Calibre 1930 is a vintage Swiss manual-wind mechanical movement celebrated for its precision, reliability, and unique alarm complication. Produced mainly from the 1940s through the 1970s, this calibre features sweep seconds with an alarm function, making it a distinctive and highly valued movement among watch collectors and restorers.
Key Technical Highlights
Calibre: AS 1930
Movement Type: Manual winding, mechanical with alarm and sweep seconds
Diameter: 25.60 mm (11.5 lignes)
Height: 5.75 mm
Jewels: 17 synthetic ruby jewels
Beat Rate: 21,600 vibrations per hour (3 Hz)
Power Reserve: Approximately 50 hours
Alarm Duration: Around 12 seconds
Functions: Hours, minutes, sweep seconds, mechanical alarm
Shock Protection: Vintage anti-shock system (often Incabloc or equivalent)
Lift Angle: Approximately 52°
Common Spare Parts and Components
Mainspring and Barrel: Original or new-old-stock (NOS) mainsprings are crucial for consistent power delivery and alarm function longevity.
Balance Wheel and Balance Staff: Precision components essential for reliable timekeeping and shock resistance; exact fitting parts are required.
Alarm Mechanism Components: Unique parts including alarm spring, hammer, and settings demand careful sourcing to maintain alarm performance.
Pallet Fork and Escape Wheel: Wear-prone escapement parts; genuine or NOS replacements ensure smooth operation.
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): Precise fitting parts vital for smooth winding, time setting, and alarm activation.
Jewels: Synthetic ruby bearings arranged to minimize friction; replacements must match original layout to preserve movement integrity.
Hands and Dial Components: Period-appropriate parts maintain vintage authenticity and enhance collector value.
Sourcing and Maintenance Tips
Use only original, NOS, or donor parts specifically marked for AS 1930 to guarantee compatibility and preserve movement quality.
Handle delicate components like the alarm mechanism, balance assembly, and escapement with great care during servicing.
Apply modern synthetic watch oils sparingly and adhere to vintage lubrication standards for optimal performance and longevity.
Always verify the calibre number stamped on the main plate before ordering parts to avoid mismatches.
Donor AS 1930 movements are valuable sources for rare or worn components.
Why AS 1930 Spare Parts Matter
Authentic parts maintain the calibre’s accuracy, reliable manual winding, and distinctive mechanical alarm function, crucial for dependable vintage watch operation.
Proper restoration with genuine components safeguards the historical significance and collector value of these classic Swiss manual-wind alarm watches.
Detailed technical documentation and an active watchmaker community facilitate efficient parts sourcing and expert servicing.
Maintaining the A. Schild AS 1930 calibre with high-quality, authentic spare parts ensures these vintage manual-wind alarm watches continue running reliably while preserving their special place in Swiss horological history.
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Stem, Crown, Hands & Spares might be available for this movement.
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