A. Schild (AS) Calibre 1861 Watch Spare Parts: Technical Overview and Sourcing Guide
A. Schild (AS) Calibre 1861 is a vintage Swiss manual-wind mechanical chronograph movement prized for its precision, robustness, and classic design. Though closely related to the famous Omega Caliber 1861 (itself based on the Lemania 1873), the AS 1861 is recognized within vintage watch circles for its reliable chronograph functions and mechanical durability.
Key Technical Highlights
Calibre: AS 1861
Movement Type: Manual winding, mechanical chronograph
Diameter: Around 26–27 mm (approx. 11.5 lignes)
Height: About 6.87 mm
Jewels: 17 to 18 synthetic ruby jewels
Beat Rate: 21,600 vibrations per hour (3 Hz)
Power Reserve: Approximately 46 to 48 hours
Functions: Chronograph (central seconds, 30-minute counter), hours, minutes, small seconds
Shock Protection: Vintage anti-shock system, typically Incabloc or equivalent
Lift Angle: Around 52°
Common Spare Parts and Components
Mainspring and Barrel: Provides consistent and reliable power delivery; use original or new-old-stock (NOS) mainsprings for durability and correct torque.
Balance Wheel and Balance Staff: Precision components essential for accurate timing and shock resistance; must be exact fits.
Chronograph Mechanism Parts: Includes column wheel, coupling lever, chronograph brake (commonly made from plastic polymer materials like Delrin), and minute recording components; sourcing genuine or high-quality NOS parts ensures smooth chronograph operation.
Pallet Fork and Escape Wheel: Wear-prone escapement parts; original or NOS components maintain smooth and reliable escapement action.
Gear Train Wheels (Minute, Third, Fourth): Frequently replaced due to natural wear; sourced from donor movements or NOS stock.
Setting Mechanism (Stem, Crown, Levers, Springs): Precisely fitting parts are critical for smooth winding, time setting, and chronograph control.
Jewels: Synthetic ruby bearings arranged to minimize friction; replacements must exactly match the original layout for movement integrity.
Hands and Dial Components: Period-correct parts maintain vintage aesthetics and collector appeal.
Sourcing and Maintenance Tips
Always use original, NOS, or donor parts marked for AS 1861 or compatible vintage chronograph calibers to ensure reliable compatibility and function.
Handle delicate chronograph components and balance assemblies with care during servicing to avoid damage.
Apply modern synthetic watch oils sparingly, following vintage lubrication protocols to optimize longevity and performance.
Verify the calibre number stamped on the movement main plate before ordering parts to avoid mismatches.
Donor AS 1861 or Lemania 1873 movements can be invaluable sources for rare or worn components.
Why AS 1861 Spare Parts Matter
Genuine parts preserve the movement’s chronograph precision, mechanical reliability, and durability, essential for dependable vintage watch performance.
Proper restoration with authentic components maintains the historical significance and collector value of this classic manual-wind chronograph calibre.
Detailed technical documentation and an active watchmaker community support expert repairs and reliable parts sourcing.
Maintaining the A. Schild AS 1861 calibre with high-quality, authentic spare parts is vital for ensuring these prestigious vintage chronographs continue to perform reliably and honor their important place in Swiss horological heritage.
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Stem, Crown, Hands & Spares might be available for this movement.
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