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A Schild – AS Calibre 1820 Watch spare parts
| A Schild – AS Calibre 1820 – Part No. 100 plate |
| A Schild – AS Calibre 1820 – Part No. 105 Barrel bridge |
| A Schild – AS Calibre 1820 – Part No. 118 Combined bridge |
| A Schild – AS Calibre 1820 – Part No. 121 Balance cock |
| A Schild – AS Calibre 1820 – Part No. 125 Pallet cock |
| A Schild – AS Calibre 1820 – Part No. 163/1 Center pipe |
| A Schild – AS Calibre 1820 – Part No. 182 Barrel and cover |
| A Schild – AS Calibre 1820 – Part No. 195 Barrel arbor |
| A Schild – AS Calibre 1820 – Part No. 200/1 Large driving wheel |
| A Schild – AS Calibre 1820 – Part No. 210 Third wheel |
| A Schild – AS Calibre 1820 – Part No. 227 Sweep second wheel |
| A Schild – AS Calibre 1820 – Part No. 240 Cannon pinion with clam notch |
| A Schild – AS Calibre 1820 – Part No. 243 Cannon pinion without clam notch |
| A Schild – AS Calibre 1820 – Part No. 255 Hour wheel |
| A Schild – AS Calibre 1820 – Part No. 260 Minute wheel |
| A Schild – AS Calibre 1820 – Part No. 307/1 Regulator for adjustable stud holder |
| A Schild – AS Calibre 1820 – Part No. 375 Adlustable stud holder |
| A Schild – AS Calibre 1820 – Part No. 401 Winding stem |
| A Schild – AS Calibre 1820 – Part No. 407 Clutch wheel |
| A Schild – AS Calibre 1820 – Part No. 410 Winding pinion |
| A Schild – AS Calibre 1820 – Part No. 415 Ratchet wheel |
| A Schild – AS Calibre 1820 – Part No. 420 Crown wheel |
| A Schild – AS Calibre 1820 – Part No. 422 Crown wheel ring |
| A Schild – AS Calibre 1820 – Part No. 425 Click |
| A Schild – AS Calibre 1820 – Part No. 430 Click spring |
| A Schild – AS Calibre 1820 – Part No. 435 Yoke |
| A Schild – AS Calibre 1820 – Part No. 440 Yoke spring |
| A Schild – AS Calibre 1820 – Part No. 443/1 Setting lever |
| A Schild – AS Calibre 1820 – Part No. 445/1 Setting Iever spring |
| A Schild – AS Calibre 1820 – Part No. 450 Setting wheel |
| A Schild – AS Calibre 1820 – Part No. 468 Cannon pinion guard |
| A Schild – AS Calibre 1820 – Part No. 705 Escape wheel and pinion |
| A Schild – AS Calibre 1820 – Part No. 710 Jewelled pallet fork |
| A Schild – AS Calibre 1820 – Part No. 714 Pallet staff |
| A Schild – AS Calibre 1820 – Part No. 721 Complete Balance |
| A Schild – AS Calibre 1820 – Part No. 730 Roller |
| A Schild – AS Calibre 1820 – Part No. 770 Mainspring |
| A Schild – AS Calibre 1820 – Part No. 775 Brake spring |
| A Schild – AS Calibre 1820 – Part No. 1141/1 Lower bridge for automatic device |
| A Schild – AS Calibre 1820 – Part No. 1142 Upper bridge for automatic device |
| A Schild – AS Calibre 1820 – Part No. 1143/1 Oscillating weight, mounted |
| A Schild – AS Calibre 1820 – Part No. 1155 Lower cock for reduclion gear |
| A Schild – AS Calibre 1820 – Part No. 1428 Stop click |
| A Schild – AS Calibre 1820 – Part No. 1448 Stop click spring NOS) |
| A Schild – AS Calibre 1820 – Part No. 1470 Reverser spring |
| A Schild – AS Calibre 1820 – Part No. 1481 Reducrion gear |
| A Schild – AS Calibre 1820 – Part No. 1482 Driving gear for crown wheel |
| A Schild – AS Calibre 1820 – Part No. 1485/1 Reverser, mounled |
| A Schild – AS Calibre 1820 – Part No. 1491 Oscillating weight bolt |
| A Schild – AS Calibre 1820 – Part No. 2535 Date indicator guard |
| A Schild – AS Calibre 1820 – Part No. 2555 Date indicator guard |
| A Schild – AS Calibre 1820 – Part No. 2557 Date indicator |
| A Schild – AS Calibre 1820 – Part No. 2558 Double-toothing hour wheel |
| A Schild – AS Calibre 1820 – Part No. 2561/2 Day star with disk not transferred |
| A Schild – AS Calibre 1820 – Part No. 2575 Date Jumper spring |
| A Schild – AS Calibre 1820 – Part No. 2576 Date Jumper |
| A Schild – AS Calibre 1820 – Part No. 2577 Day jumper |
| A Schild – AS Calibre 1820 – Part No. 2632/1 Unlocking yoke for date indicator, mounted |
| A Schild – AS Calibre 1820 – Part No. 2633 Unlocking yoke for date indicator |
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A. Schild (AS) Calibre 1820 Watch Spare Parts: Technical Overview and Sourcing Guide
A. Schild (AS) Calibre 1820 is a vintage Swiss automatic movement noted for its robust construction, proven reliability, and inclusion of sweep seconds, day, and date complications. Frequently found in mid-20th-century wristwatches, restoring this calibre demands attention to detail and precise sourcing of specialty parts.
Key Technical Highlights
Calibre: AS 1820
Movement Type: Automatic, mechanical
Diameter: 11.5 lignes (25.60mm)
Height: 4.70mm
Jewels: 17, 21, or 25 synthetic ruby jewels
Beat Rate: 18,000 vibrations per hour (vph)
Power Reserve: Approximately 40–42 hours
Functions: Hours, minutes, sweep seconds, day (set by ±24h), date (set by changing 20:00–24:00)
Shock Protection: Incabloc or similar vintage system
Lift Angle: 52°
Rotor: Ball-bearing style for efficient automatic winding
Common Spare Parts and Components
Mainspring and Barrel: Critical for stable power delivery; exact replacements (including NOS) are available and ensure long-running reliability.
Balance Wheel and Balance Staff: Precision, shock-protected parts vital for timekeeping; matching genuine components is essential.
Rotor Assembly and Bearings: Central to dependable automatic winding; worn or damaged rotors should be replaced with compatible original or new-old-stock units.
Pallet Fork and Escape Wheel: Wear-prone escapement parts; use original or high-grade NOS for smooth function and longevity.
Gear Train Wheels (Minute, Third, Fourth): Frequently replaced due to wear or damage; sourced from donor movements or NOS inventories.
Winding Stem (Part No. 401): The official Swiss-made stem for the AS 1820; suited for seamless fit and operation of winding, setting, and quickset features.
Setting Mechanism (Crown, Levers, Springs): Must be original spec for precise winding, time, and calendar adjustments.
Jewels: Replacement synthetic ruby bearings need to match the original configuration and placement.
Hands and Dial Components: Period-appropriate pieces preserve authenticity and collector value.
Sourcing and Maintenance Tips
Select original, NOS, or properly marked donor parts for the AS 1820 to ensure quality and fit.
Handle delicate components, especially the balance, escapement, and rotor assemblies, with care during service.
Use synthetic watch oils sparingly, adhering to vintage lubrication practices to safeguard longevity and optimal function.
Always confirm the calibre number stamped on the main plate before ordering any parts for perfect compatibility.
Donor AS 1820 movements are a valuable resource for rare or worn pieces.
Why AS 1820 Spare Parts Matter
Authentic, well-matched parts protect the calibre’s precision, durability, and mechanical reliability.
Correct restoration with genuine components preserves the historical and collectible significance of these Swiss automatics.
Active vintage watchmaker communities and technical documentation support effective parts sourcing and skilled repairs.
Maintaining the A. Schild AS 1820 movement with quality spare parts is essential for keeping these vintage automatics performing reliably and honoring their place in Swiss horological history.