A. Schild (AS) Calibre 1901 Watch Spare Parts: Technical Overview and Sourcing Guide
A. Schild (AS) Calibre 1901 is a vintage Swiss manual-wind mechanical movement renowned for its precision, reliability, and classic design. It features sweep seconds and a date complication, making it a practical yet elegant choice in mid-20th-century wristwatches. The calibre is a favored movement among collectors and watchmakers for restoration projects.
Key Technical Highlights
Calibre: AS 1901
Movement Type: Manual winding, mechanical with sweep seconds and date
Diameter: 25.60 mm (11.5 lignes)
Height: 4.00 mm
Jewels: 17 or 21 synthetic ruby jewels
Beat Rate: 21,600 vibrations per hour (3 Hz)
Power Reserve: Approximately 48 hours
Functions: Hours, minutes, sweep seconds, date window
Shock Protection: Vintage anti-shock system (likely Incabloc or equivalent)
Common Spare Parts and Components
Mainspring and Barrel: Critical for steady power delivery; use original or new-old-stock (NOS) mainsprings for durability and correct torque.
Balance Wheel and Balance Staff: Precision parts crucial for accurate timekeeping and shock resistance; must fit exactly for reliable performance.
Pallet Fork and Escape Wheel: Wear-prone escapement components; sourcing genuine or NOS replacements ensures smooth operation.
Gear Train Wheels: Includes minute, third, and sweep second wheels; often replaced due to wear, typically sourced from donor movements or NOS stock.
Setting Mechanism (Stem, Crown, Levers, Springs): Essential for smooth winding, time setting, and date adjustment; winding stems such as Part No. 401 are commonly compatible.
Jewels: Synthetic ruby bearings arranged to reduce friction; replacements must match the original layout precisely.
Hands and Dial Components: Period-appropriate parts preserve vintage look and maintain collector value.
Date Mechanism Components: Including date indicator guard, intermediate date wheel, date jumper springs, and unlocking yokes for date function reliability.
Sourcing and Maintenance Tips
Always use original, NOS, or donor parts specifically marked for AS 1901 to ensure full compatibility and maintain movement integrity.
Handle delicate components such as the balance assembly, escapement, and setting mechanisms with care during servicing.
Apply modern synthetic watch oils sparingly, adhering to vintage lubrication standards for optimal performance and longevity.
Verify the calibre number stamped on the main plate before ordering parts to prevent mismatches.
Donor AS 1901 movements are valuable sources of rare or worn parts, especially for the date mechanism and gear trains.
Why AS 1901 Spare Parts Matter
Genuine parts preserve the calibre’s accuracy, mechanical reliability, and smooth manual winding operation, crucial for dependable vintage watch function.
Proper restoration using authentic components helps maintain the historical significance and collector value of these classic Swiss manual-wind watches.
Well-documented technical specifications and active watchmaker communities make parts sourcing and expert servicing more efficient.
Maintaining the A. Schild AS 1901 calibre with quality, authentic spare parts is essential to keep these vintage watches running reliably while honoring their 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