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 1789 Watch Spare Parts: Technical Overview and Sourcing Guide
A. Schild (AS) Calibre 1789 is a vintage Swiss automatic mechanical movement known for its compact design, reliability, and useful complications. Produced predominantly in the 1960s, it features automatic winding, sweep seconds, a date function, and a 24-hour display. Its robust construction makes it popular among collectors and watchmakers restoring mid-century wristwatches.
Key Technical Highlights
Calibre: AS 1789
Movement Type: Automatic, mechanical
Diameter: Approximately 26 mm (11.5 lignes)
Height: Around 5.25 mm
Jewels: 17, 21, or 25 synthetic ruby jewels
Beat Rate: 18,000 vibrations per hour (vph)
Power Reserve: About 41 hours
Functions: Hours, minutes, sweep seconds, date, 24-hour display
Shock Protection: Vintage Incabloc or similar anti-shock system
Date Setting: Typically set by adjusting time between 8:30 PM and midnight
Notable Features: Early fixed stud and later mobile stud carrier design variants
Common Spare Parts and Components
Mainspring and Barrel: Ensure stable power delivery; replacements should match original specs for torque and duration.
Balance Wheel and Balance Staff: Precision components vital for accurate timekeeping and shock resistance; exact fit is essential.
Rotor Assembly and Bearings: Critical for smooth automatic winding; worn parts require quality original or NOS replacements.
Pallet Fork and Escape Wheel: Wear-prone escapement parts; sourcing genuine or high-grade NOS is vital for smooth operation.
Gear Train Wheels (Minute, Third, Fourth): Typical replacements due to wear; sourced from donor movements or NOS stock.
Setting Mechanism (Stem, Crown, Levers, Springs): Must fit precisely for smooth winding, time, date, and 24-hour display adjustments.
Jewels: Synthetic ruby bearings positioned to minimize friction; replacements must align exactly with the original layout.
Hands and Dial Components: Period-correct parts help maintain vintage authenticity and collector appeal.
Sourcing and Maintenance Tips
Use original, NOS, or donor parts specifically marked for AS 1789 to ensure compatibility and maintain movement quality.
Handle delicate parts such as balance assembly, escapement, and rotor carefully during servicing.
Apply modern synthetic watch oils sparingly, following vintage lubrication standards for longevity and performance.
Always verify the calibre number stamped on the main plate before ordering parts to avoid mismatches.
Donor AS 1789 movements are invaluable for sourcing rare or worn components.
Why AS 1789 Spare Parts Matter
Authentic parts maintain the calibre’s accuracy, reliability, and automatic winding efficiency, crucial for consistent performance and collector value.
Proper restoration using genuine components preserves the historical significance and vintage appeal of these classic Swiss automatic watches.
Detailed technical documentation and an active watchmaker community facilitate trusted parts sourcing and expert repairs.
Maintaining the A. Schild AS 1789 calibre with quality spare parts is essential for ensuring these distinguished vintage automatic wristwatches continue to perform reliably while honoring their legacy in Swiss horology.