A Schild – AS Calibre 1903 Watch spares Parts List
| A Schild – AS Calibre 1903 – Part No. 100 plate (NOS) |
| A Schild – AS Calibre 1903 – Part No. 105 Barrel bridge (NOS) |
| A Schild – AS Calibre 1903 – Part No. 118 Combined bridge (NOS) |
| A Schild – AS Calibre 1903 – Part No. 121 Balance cock (NOS) |
| A Schild – AS Calibre 1903 – Part No. 125 Pallet cock (NOS) |
| A Schild – AS Calibre 1903 – Part No. 163/1 Center pipe (NOS) |
| A Schild – AS Calibre 1903 – Part No. 182 Barrel and cover (NOS) |
| A Schild – AS Calibre 1903 – Part No. 195 Barrel arbor (NOS) |
| A Schild – AS Calibre 1903 – Part No. 200/1 Large driving wheel (NOS) |
| A Schild – AS Calibre 1903 – Part No. 210 Third wheel (NOS) |
| A Schild – AS Calibre 1903 – Part No. 227 Sweep second wheel (NOS) |
| A Schild – AS Calibre 1903 – Part No. 240 Cannon pinion with clam notch (NOS) |
| A Schild – AS Calibre 1903 – Part No. 243 Cannon pinion without clam notch (NOS) |
| A Schild – AS Calibre 1903 – Part No. 255 Hour wheel (NOS) |
| A Schild – AS Calibre 1903 – Part No. 260 Minute wheel (NOS) |
| A Schild – AS Calibre 1903 – Part No. 307/1 Regulator for adjustable stud holder (NOS) |
| A Schild – AS Calibre 1903 – Part No. 375 Adlustable stud holder (NOS) |
| A Schild – AS Calibre 1903 – Part No. 401 Winding stem (NOS) |
| A Schild – AS Calibre 1903 – Part No. 407 Clutch wheel (NOS) |
| A Schild – AS Calibre 1903 – Part No. 410 Winding pinion (NOS) |
| A Schild – AS Calibre 1903 – Part No. 415 Ratchet wheel (NOS) |
| A Schild – AS Calibre 1903 – Part No. 420 Crown wheel (NOS) |
| A Schild – AS Calibre 1903 – Part No. 422 Crown wheel ring (NOS) |
| A Schild – AS Calibre 1903 – Part No. 425 Click (NOS) |
| A Schild – AS Calibre 1903 – Part No. 430 Click spring (NOS) |
| A Schild – AS Calibre 1903 – Part No. 435 Yoke (NOS) |
| A Schild – AS Calibre 1903 – Part No. 440 Yoke spring (NOS) |
| A Schild – AS Calibre 1903 – Part No. 443 Setting lever (NOS) |
| A Schild – AS Calibre 1903 – Part No. 445 Setting Iever spring (NOS) |
| A Schild – AS Calibre 1903 – Part No. 450 Setting wheel (NOS) |
| A Schild – AS Calibre 1903 – Part No. 468 Cannon pinion guard (NOS) |
| A Schild – AS Calibre 1903 – Part No. 705 Escape wheel and pinion (NOS) |
| A Schild – AS Calibre 1903 – Part No. 710 Jewelled pallet fork (NOS) |
| A Schild – AS Calibre 1903 – Part No. 714 Pallet staff (NOS) |
| A Schild – AS Calibre 1903 – Part No. 721 Complete Balance (NOS) |
| A Schild – AS Calibre 1903 – Part No. 730 Roller (NOS) |
| A Schild – AS Calibre 1903 – Part No. 770 Mainspring (NOS) |
| A Schild – AS Calibre 1903 – Part No. 1141/1 Lower bridge for automatic device (NOS) |
| A Schild – AS Calibre 1903 – Part No. 1142 Upper bridge for automatic device (NOS) |
| A Schild – AS Calibre 1903 – Part No. 1143/1 Oscillating weight, mounted (NOS) |
| A Schild – AS Calibre 1903 – Part No. 1155 Lower cock for reduclion gear (NOS) |
| A Schild – AS Calibre 1903 – Part No. 1428 Stop click (NOS) |
| A Schild – AS Calibre 1903 – Part No. 1448 Stop click spring NOS) |
| A Schild – AS Calibre 1903 – Part No. 1470 Reverser spring (NOS) |
| A Schild – AS Calibre 1903 – Part No. 1481 Reduction gear (NOS) |
| A Schild – AS Calibre 1903 – Part No. 1482 Driving gear for crown wheel (NOS) |
| A Schild – AS Calibre 1903 – Part No. 1485/1 Reverser, mounled (NOS) |
| A Schild – AS Calibre 1903 – Part No. 1491 Oscillating weight bolt (NOS) |
| A Schild – AS Calibre 1903 – Part No. 2535 Date indicator guard (NOS) |
| A Schild – AS Calibre 1903 – Part No. 2543 Intermediate date wheel (NOS) |
| A Schild – AS Calibre 1903 – Part No. 2557 Date indicator (NOS) |
| A Schild – AS Calibre 1903 – Part No. 2558 Double-toothing hour wheel (NOS) |
| A Schild – AS Calibre 1903 – Part No. 2575 Date Jumper spring (NOS) |
| A Schild – AS Calibre 1903 – Part No. 2576 Date Jumper (NOS) |
| A Schild – AS Calibre 1903 – Part No. 2632/1 Unlocking yoke for date indicator, mounted (NOS) |
| A Schild – AS Calibre 1903 – Part No. 2633 Unlocking yoke for date indicator (NOS) |
A. Schild (AS) Calibre 1903 Watch Spare Parts: Technical Overview and Sourcing Guide
A. Schild (AS) Calibre 1903 is a vintage Swiss automatic mechanical movement appreciated for its reliable performance, practical complications, and robust construction. Produced primarily around the 1970s, this calibre features automatic winding with a sweep second and a date complication, which is set by changing the time between 8 PM and midnight, offering a practical quickset date functionality.
Key Technical Highlights
Calibre: AS 1903
Movement Type: Automatic, mechanical with sweep seconds
Diameter: 25.60 mm (11.5 lignes)
Height: Approximately 5.20 mm
Jewels: 17, 21, or 25 synthetic ruby jewels
Beat Rate: 21,600 vibrations per hour (3 Hz)
Power Reserve: Approximately 44 hours
Functions: Hours, minutes, sweep seconds, date (set by changing time between 20:00 and 24:00)
Shock Protection: Vintage anti-shock system (commonly Incabloc or equivalent)
Rotor: Ball-bearing type for smooth and efficient automatic winding
Lift Angle: Approximately 52°
Common Spare Parts and Components
Mainspring and Barrel: Key for consistent power delivery; original or new-old-stock (NOS) mainsprings ensure accurate torque and durability.
Balance Wheel and Balance Staff: Precision parts critical for accurate timekeeping and shock resistance; must be exact fit for reliable operation.
Rotor Assembly and Bearings: Crucial for efficient automatic winding; worn components require genuine or high-quality NOS replacement parts.
Pallet Fork and Escape Wheel: Wear-prone escapement parts; sourcing original or NOS components maintains smooth and reliable operation.
Gear Train Wheels (Minute, Third, Fourth): Commonly replaced due to wear; usually sourced from donor movements or NOS stock.
Setting Mechanism (Stem, Crown, Levers, Springs): Precise fitting parts necessary for smooth winding, time setting, and date adjustments. Winding stem Part No. 401 is compatible.
Jewels: Synthetic ruby bearings arranged to minimize friction; replacements must match original layout to preserve movement integrity.
Hands and Dial Components: Period-correct parts maintain vintage authenticity and enhance collector appeal.
Sourcing and Maintenance Tips
Always use original, NOS, or donor parts specifically designated for AS 1903 to guarantee compatibility and preserve movement quality.
Handle delicate components such as balance assemblies, escapement parts, and rotor carefully during servicing to avoid damage.
Apply modern synthetic watch oils sparingly, following vintage lubrication protocols for optimal longevity and performance.
Verify the calibre number stamped on the movement main plate before ordering parts to avoid mismatches or incompatibilities.
Donor AS 1903 movements provide valuable sources for rare or worn components and parts.
Why AS 1903 Spare Parts Matter
Genuine parts preserve the calibre’s accuracy, reliable automatic winding, and efficient date function, vital for dependable vintage watch operation.
Proper restoration with authentic components supports the historical significance and collector value of these classic Swiss automatic wristwatches.
Well-documented technical data and an active watchmaker community help ensure efficient parts sourcing and expert repairs.
Maintaining the A. Schild AS 1903 calibre with high-quality, authentic spare parts is essential to keeping these vintage automatics running smoothly while honoring their place in Swiss horological heritage.
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