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A. Schild (AS) Calibre 1783 Watch Spare Parts: Technical Overview and Sourcing Guide
A. Schild (AS) Calibre 1783 is a vintage Swiss automatic mechanical movement highly regarded for its reliability, compact size, and classic complications including sweep seconds and date function. It is a refined calibre based on the AS 1780, with a quickset date feature allowing instant change at midnight. Its high beat rate enhances precision, making it a popular choice for vintage ladies’ and small wristwatches.
Key Technical Highlights
Calibre: AS 1783
Movement Type: Automatic, mechanical with sweep seconds and date complication
Diameter: Approximately 19.4 mm (8.75 lignes)
Height: About 5.15 mm
Jewels: 17 or 21 synthetic ruby jewels
Beat Rate: 21,600 vibrations per hour (vph)
Power Reserve: Around 38 hours
Shock Protection: Incabloc anti-shock system
Balance: Nickel anular balance with clockwise hairspring and movable stud
Lift Angle: 52°
Date Setting: Typically set by changing time between 9:30 PM and midnight
Common Spare Parts and Components
Mainspring and Barrel: Essential for steady power flow; original or NOS parts ensure proper torque and power reserve.
Balance Wheel and Balance Staff: Precision components crucial for timing accuracy and shock absorption; require exact replacements.
Rotor Assembly and Bearings: Critical for efficient automatic winding; worn components should be replaced with quality original or new-old-stock (NOS) parts.
Pallet Fork and Escape Wheel: Wear-prone escapement parts; sourcing original or NOS components is vital for smooth operation.
Gear Train Wheels (Minute, Third, Fourth): Typically replaced due to wear or damage; generally sourced from donor movements or NOS stock.
Setting Mechanism (Stem, Crown, Levers, Springs): Precise fitting parts ensure smooth winding, time, and date setting functionalities.
Jewels: Synthetic ruby bearings arranged to minimize friction; replacements must match original layout and count.
Hands and Dial Components: Period-correct parts maintain vintage authenticity and preserve collector value.
Sourcing and Maintenance Tips
Use original, NOS, or donor parts specified for AS 1783 to guarantee compatibility and maintain movement quality.
Handle delicate components like the balance, escapement, and rotor with care during servicing.
Apply modern synthetic watch oils sparingly, adhering to vintage lubrication standards for optimal longevity.
Always verify the calibre number stamped on the main plate before ordering parts to avoid mismatches.
Donor AS 1783 movements serve as valuable resources for rare and worn spare parts.
Why AS 1783 Spare Parts Matter
Authentic parts preserve the calibre’s precision, automatic winding reliability, and durability, essential for longevity and accurate timekeeping.
Proper restoration with genuine components sustains the historical importance and collector appeal of these classic Swiss automatic watches.
Well-documented technical specifications and an active watchmaker community facilitate efficient parts sourcing and expert servicing.
Maintaining the A. Schild AS 1783 calibre with high-quality spare parts ensures these sophisticated vintage automatic wristwatches continue to perform reliably while honoring their esteemed place in Swiss horological history.