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A. Schild (AS) Calibre 1866 Watch Spare Parts: Technical Overview and Sourcing Guide
A. Schild (AS) Calibre 1866 is a vintage Swiss automatic mechanical movement known for its reliable performance, classic design, and practical complications. Produced around the 1970s, this calibre features a robust build, efficient automatic winding, and a power reserve of approximately 42 hours, making it a reliable choice for vintage wristwatches.
Key Technical Highlights
Calibre: AS 1866
Movement Type: Automatic, mechanical
Diameter: 26 mm (11.5 lignes)
Jewels: 17, 21, or 25 synthetic ruby jewels
Beat Rate: 21,600 vibrations per hour (vph)
Power Reserve: Approximately 42 hours
Lift Angle: 52°
Functions: Hours, minutes, sweep seconds, date complication
Shock Protection: Vintage anti-shock system (typical for the era)
Rotor: Ball-bearing type for smooth and efficient automatic winding
Common Spare Parts and Components
Mainspring and Barrel: Essential for stable and consistent power transmission; original or NOS mainsprings recommended for longevity and proper torque.
Balance Wheel and Balance Staff: Precision components critical for accurate timekeeping and shock resistance; must fit exactly to maintain reliability.
Rotor Assembly and Bearings: Key parts of the automatic winding mechanism; worn components require genuine or NOS replacements for smooth operation.
Pallet Fork and Escape Wheel: Wear-prone escapement parts; sourcing original or quality NOS components preserves smooth escapement function.
Gear Train Wheels (Minute, Third, Fourth): Commonly replaced due to wear; typically sourced from donor movements or NOS stock.
Setting Mechanism (Stem, Crown, Levers, Springs): Accurate fit is necessary for smooth winding, setting, and date adjustment; compatible winding stems include the original Swiss-made Part No. 401.
Jewels: Synthetic ruby bearings arranged to minimize friction; replacements must correspond precisely to the original layout.
Hands and Dial Components: Period-correct parts maintain vintage authenticity and add collector value.
Sourcing and Maintenance Tips
Use original, NOS, or donor parts specifically marked for AS 1866 to ensure proper fit and movement integrity.
Handle delicate components like the balance, escapement, and rotor assembly with care during servicing.
Apply modern synthetic watch oils sparingly, adhering to vintage lubrication standards for optimal longevity and performance.
Always verify the calibre number stamped on the main plate before ordering parts to avoid compatibility issues.
Donor AS 1866 movements serve as valuable sources for rare or worn spare parts.
Why AS 1866 Spare Parts Matter
Genuine parts maintain the calibre’s accuracy, reliability, and efficient automatic winding, essential for dependable performance in vintage watches.
Proper restoration with authentic components preserves the historical significance and collector appeal of these classic Swiss automatic movements.
Well-documented technical specifications and an active watchmaker community facilitate efficient parts sourcing and expert servicing.
Maintaining the A. Schild AS 1866 calibre with high-quality, authentic spare parts ensures these vintage automatics continue to perform reliably while honoring their legacy in Swiss horology.
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Watch Parts Enquiry
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Stem, Crown, Hands & Spares might be available for this movement.
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