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A. Schild (AS) Calibre 1693 Watch Spare Parts: Technical Overview and Sourcing Guide
A. Schild (AS) Calibre 1693 is a vintage Swiss manual-wind mechanical movement valued for its reliability, classic design, and useful date complication feature. This calibre has a diameter of approximately 25.60 mm (11.5 lignes), a height of about 4.00 mm, and runs at a beat rate of 18,000 vibrations per hour (vph). It typically contains 15 or 17 synthetic ruby jewels and offers a power reserve of about 50 hours. Popular with collectors and watchmakers, it is commonly used in mid-20th-century wristwatch restoration.
Key Technical Highlights
Calibre: AS 1693
Movement Type: Manual winding, mechanical
Diameter: Approximately 25.60 mm (11.5 lignes)
Height: Around 4.00 mm
Jewels: 15 or 17 synthetic ruby jewels
Beat Rate: 18,000 vibrations per hour (vph)
Power Reserve: Approximately 50 hours
Functions: Hours, minutes, small seconds (subdial), date (date set by changing time between 21:50 and 24:00)
Shock Protection: Standard vintage anti-shock system
Common Spare Parts and Components
Mainspring and Barrel: Essential for stable power storage and smooth energy delivery; replacement parts must closely match original specifications to maintain torque and durability.
Balance Wheel and Balance Staff: Delicate and critical parts for time accuracy and shock resistance that require precise fit and quality replacement.
Pallet Fork and Escape Wheel: Wear-prone escapement components that should be replaced with original or high-quality new-old-stock (NOS) parts to ensure reliable operation.
Gear Train Wheels (Minute, Third, Fourth): Commonly subjected to wear and pivot damage; often sourced from donor movements or NOS stock.
Setting Mechanism (Stem, Crown, Levers, Springs): Must fit exactly to maintain smooth winding, time, and date setting functionality.
Jewels: Synthetic ruby bearings placed to decrease friction and wear; replacements must match the original count and arrangement.
Hands and Dial: Period-correct or original parts help preserve vintage authenticity and collector value.
Sourcing and Maintenance Tips
Prefer original, NOS, or donor parts explicitly marked for AS 1693 to guarantee compatibility and maintain movement integrity.
Donor AS 1693 movements can be valuable sources for rare components, especially balance staffs, escapement pieces, and winding stems.
Handle delicate parts carefully during servicing, especially balance wheels and escapement components.
Use 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 mismatches.
Why AS 1693 Spare Parts Matter
Using authentic or precise compatible parts preserves the calibre’s accuracy, reliability, and mechanical longevity.
Proper restoration with genuine components maintains the historical significance and collector appeal of these classic Swiss manual-wind movements.
The AS 1693’s well-documented specs and active watchmaker community support facilitate parts sourcing and expert servicing.
Maintaining the A. Schild AS 1693 calibre with quality spare parts is critical to keep these dependable vintage manual-wind watches running reliably and preserving their valued heritage in horology.