A. Schild (AS) Calibre 5104 Watch Spare Parts: Technical Overview and Sourcing Guide
A. Schild (AS) Calibre 5104 is a Swiss manual wind mechanical movement highly appreciated for its precision and reliability. This calibre measures 19.7 mm (8.75 lignes) in diameter, with 17 jewels, a beat rate of 21,600 vibrations per hour (3 Hz), and a power reserve of around 50 hours. Used predominantly in the early 1970s, it remains a preferred choice for vintage watch collectors and repair experts.
Key Technical Highlights
Calibre: AS 5104
Movement Type: Manual winding, mechanical
Diameter: 19.7 mm (8.75 lignes)
Jewels: 17 synthetic ruby jewels
Beat Rate: 21,600 vibrations per hour (3 Hz)
Power Reserve: Approximately 50 hours
Lift Angle: 53°
Period Used: Early 1970s
Common Spare Parts and Components
Mainspring and Barrel: Original or New-Old-Stock (NOS) mainsprings ensure consistent power and longevity.
Balance Wheel and Balance Staff: Precision parts vital for accurate timing and shock resistance; exact replacements are essential.
Pallet Fork and Escape Wheel: Escapement components that wear and require genuine or NOS replacements for smooth function.
Gear Train Wheels: Replacement wheels such as minute, third, and fourth wheels sourced from NOS or donor calibers.
Setting Mechanism (Stem, Crown, Levers, Springs): Proper fit is crucial for smooth winding and time setting.
Jewels: Synthetic ruby bearings reduce wear and friction; replacements must conform to original design.
Hands and Dial Components: Authentic parts maintain vintage aesthetics and collector value.
Sourcing and Maintenance Tips
Procure original, NOS, or donor parts specifically designed for AS 5104 to ensure compatibility and quality.
Handle delicate parts including balance and escapement carefully during servicing.
Use modern synthetic lubricants sparingly, following vintage watch maintenance protocols.
Confirm the calibre number on the movement before ordering to avoid errors.
Donor movements are a valuable source for rare or discontinued spare parts.
Why AS 5104 Spare Parts Matter
Genuine components maintain the calibre’s accuracy, durability, and smooth manual winding, essential for dependable vintage watch operation.
Authentic restoration protects the historical significance and enhances collector appeal of classic Swiss movements.
Comprehensive technical documentation and watchmaker communities support effective repairs and parts sourcing.
Maintaining your A. Schild AS 5104 calibre with quality spare parts guarantees long-lasting performance and honors its place in horological history.
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Stem, Crown, Hands & Spares might be available for this movement.
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