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A. Schild (AS) Calibre 1442 Watch Spare Parts: Technical Overview and Sourcing Guide
A. Schild (AS) Calibre 1442 is a vintage Swiss manual-wind mechanical movement notable for its compact size, reliability, and additional calendar functions including day and date displays, with the date set by a pusher. It was produced mainly in mid-20th century and remains sought after for restoration by collectors and watchmakers.
Key Technical Highlights
Calibre: AS 1442
Movement Type: Manual wind, mechanical
Diameter: 11.5 lignes (approx. 25.60 mm)
Jewels: Typically 17 or 21 synthetic ruby jewels
Beat Rate: 18,000 vibrations per hour (vph)
Power Reserve: Approximately 41 hours
Functions: Hours, minutes, sweeping central seconds, day, and date (date set by pusher at 2 o’clock)
Shock Protection: Basic protection typical for vintage manual movements
Common Spare Parts and Components
Mainspring and Barrel: Essential for power storage and release; requires replacement when fatigued or broken with exact dimension matching.
Balance Wheel and Balance Staff: Delicate precision parts; must match original specifications especially with respect to shock protection.
Pallet Fork and Escape Wheel: Regular wear parts critical for escapement function; original or quality NOS replacements recommended.
Gear Train Wheels (Minute, Third, Fourth): Prone to pivot or tooth wear; donor movements or new-old-stock parts are common sources.
Setting Mechanism (Stem, Crown, Levers, Springs): Critical for manual winding and date adjustment through pushers; must fit AS 1442 specifications closely.
Jewels: Synthetic ruby bearings need correct count and placement for smooth gear operation and longevity.
Calendar Components: Specialized day and date wheels, date jumper springs, and pusher mechanism are needed to preserve full calendar function.
Hands and Dial: Period-accurate parts preserve vintage authenticity and proper fit.
Sourcing and Maintenance Tips
Prioritize original or NOS parts clearly marked for AS 1442 to maintain watch authenticity and fit.
Donor AS 1442 movements are invaluable sources for rare components and calendar-related parts.
Handle balance, escapement, and calendar pushers with care during servicing due to delicacy.
Use modern synthetic lubricants sparingly in accordance with vintage watch standards.
Confirm the calibre number stamped on the main plate before ordering parts to ensure compatibility.
Why AS 1442 Spare Parts Matter
Using genuine or precise compatible parts preserves the movement’s accuracy, calendar functions, and reliability.
Correct restoration retains collector value and historical authenticity.
AS 1442 is documented among watchmakers, easing parts sourcing and repair.
Sourcing quality spare parts is essential to keep the A. Schild AS 1442 movement functioning reliably and preserving its legacy as a classic Swiss manual wind watch with useful calendar complications.