You can confirm the order by making a PayPal payment. My account email address is [email protected]
Watch Parts Enquiry
* If you are unable to fill out any of the required information fields, please type “N/A”.
Stem, Crown, Hands & Spares might be available for this movement.
Email us for rate and availability: [email protected]
Mobile/WhatsApp: +91- 9841 360 340
A. Schild (AS) Calibre 1691 Watch Spare Parts: Technical Overview and Sourcing Guide
A. Schild (AS) Calibre 1691 is a vintage Swiss manual-wind mechanical movement known for its reliability and classic design. It features a diameter of approximately 23.3 mm (10.5 lignes) and operates at a beat rate of 18,000 vibrations per hour (vph), with a power reserve of around 50 hours. This calibre commonly has 21 synthetic ruby jewels and includes a lift angle of 52 degrees, prized by collectors and watchmakers for restoration projects of mid-20th-century wristwatches.
Key Technical Highlights
Calibre: AS 1691
Movement Type: Manual winding, mechanical
Diameter: Approximately 23.3 mm (10.5 lignes)
Beat Rate: 18,000 vibrations per hour (vph)
Power Reserve: Around 50 hours
Jewels: Typically 21 synthetic ruby jewels
Lift Angle: 52 degrees
Functions: Hours, minutes, sub-seconds (typical for the calibre size)
Shock Protection: Included to enhance durability
Common Spare Parts and Components
Mainspring and Barrel: Key for storing power and delivering consistent torque; replacements must fit original specifications closely to ensure performance and longevity.
Balance Wheel and Balance Staff: Delicate, precision parts vital for accurate timekeeping and shock resistance; require exact fit and quality replacements.
Pallet Fork and Escape Wheel: Wear-prone escapement components essential for movement smoothness; sourcing original or quality new-old-stock (NOS) parts is advised.
Gear Train Wheels (Minute, Third, Fourth): Commonly subject to wear or damage; donor movements or NOS stock are typical sources.
Setting Mechanism (Stem, Crown, Levers, Springs): Must precisely fit for reliable winding and time-setting functions.
Jewels: Synthetic ruby bearings must match original number and placement to reduce friction and increase movement durability.
Hands and Dial Components: Period-correct or original parts maintain the watch’s vintage authenticity and collector appeal.
Sourcing and Maintenance Tips
Use original, NOS, or donor parts explicitly marked for AS 1691 to ensure compatibility and preserve movement integrity.
Handle delicate components, especially balance wheel and escapement, with care during servicing.
Apply modern synthetic watch oils sparingly, adhering to vintage lubrication standards for longevity and optimal performance.
Always verify the calibre number stamped on the main plate before ordering parts to avoid mismatches.
Why AS 1691 Spare Parts Matter
Genuine parts maintain the calibre’s accuracy, reliability, and mechanical longevity, critical for proper functioning and collector value.
Authentic restoration supports the historical significance and vintage character of these classic Swiss manual-wind movements.
Well-documented technical specs and community resources facilitate sourcing and expert servicing for AS 1691 watches.
Maintaining the A. Schild AS 1691 calibre with quality spare parts is essential to keep these vintage manual-wind watches running reliably and preserving their traditional Swiss horological heritage.