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A. Schild (AS) Calibre 5008 Watch Spare Parts: Technical Overview and Sourcing Guide
A. Schild (AS) Calibre 5008 is a notable Swiss automatic alarm movement produced between 1973 and 1977. Renowned for its sophisticated dual-barrel system, it features automatic winding for both the timekeeping and alarm barrels using a unidirectional rotor with a unique mechanism that winds each barrel in opposite directions. With its advanced day-date complication and alarm function, the calibre remains highly sought after by collectors and watchmakers specializing in vintage alarm watches.
Key Technical Highlights
Calibre: AS 5008
Movement Type: Automatic, mechanical
Diameter: 30.00 mm (13.25 lignes)
Height: 7.60 mm
Jewels: 17, 21, or 25 synthetic ruby jewels
Beat Rate: 28,800 vibrations per hour (4 Hz)
Power Reserve: Approximately 49 hours
Functions: Sweep seconds, alarm, day and date with quickset, hacking seconds, hand winding
Special Features: Dual barrels with rotor winding both alarm and time barrels in opposite directions; unique gong placement for alarm sound amplification.
Era: 1970s
Common Spare Parts and Components
Mainspring and Barrel: Original or New-Old-Stock (NOS) mainsprings provide consistent power for both barrels.
Balance Wheel and Balance Staff: Precision parts essential for accurate timekeeping and shock resistance.
Alarm Module Components: Includes alarm barrels, hammers, ratchets, gongs placed between movement and dial for sound amplification.
Pallet Fork and Escape Wheel: Escapement parts prone to wear; genuine NOS parts recommended.
Gear Train Wheels: Minute, third, and fourth wheels are frequently replaced due to wear, typically sourced from NOS or donor movements.
Setting Mechanism (Stem, Crowns, Levers, Springs): Two crowns control time/date and alarm setting; exact-fit parts ensure smooth operation.
Jewels: Synthetic ruby bearings reduce friction and wear; replacements must maintain original layout.
Hands and Dial Components: Authentic parts preserve vintage aesthetics and maintain collector appeal.
Sourcing and Maintenance Tips
Use original, NOS, or donor parts designed specifically for AS 5008 to maintain compatibility and reliability.
Handle delicate alarm and escapement components with care during maintenance.
Apply modern synthetic lubricants sparingly in accordance with vintage servicing standards.
Verify the calibre number on the movement before ordering parts to avoid mismatches.
Donor AS 5008 and compatible family movements are excellent sources for rare and discontinued parts.
Why AS 5008 Spare Parts Matter
Genuine components sustain the calibre’s exacting precision, dual-barrel automatic winding, reliable alarm, and day-date functions, essential for maintaining vintage watch performance.
Authentic restoration protects the historical significance and collector value of this classic Swiss movement.
Comprehensive technical documentation and watchmaker communities aid efficient repairs and parts sourcing.
Maintaining your A. Schild AS 5008 calibre with quality spare parts guarantees enduring performance and honors its Swiss horological heritage.
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Stem, Crown, Hands & Spares might be available for this movement.
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