A. Schild (AS) Calibre 5151 Watch Spare Parts: Technical Overview and Sourcing Guide
A. Schild (AS) Calibre 5151 is a high-performance Swiss automatic mechanical movement, widely appreciated for its precision and robust construction. Known for its smooth sweep seconds and shock protection, this calibre is favored among vintage watch collectors and watchmakers for its reliability and ease of servicing.
Key Technical Highlights
Calibre: AS 5151
Movement Type: Automatic, mechanical
Beat Rate: 28,800 vibrations per hour (4 Hz)
Functions: Hours, minutes, sweep seconds
Shock Protection: Yes
Jewels: Typically 17 or more synthetic ruby jewels
Era: Circa 1970s
Common Spare Parts and Components
Mainspring and Barrel: NOS or original mainsprings promote consistent energy output and longevity.
Balance Wheel and Balance Staff: Essential for accurate timekeeping and shock resistance; exact fittings required.
Pallet Fork and Escape Wheel: Wear-prone escapement components; genuine or NOS replacements recommended for optimal performance.
Gear Train Wheels: Minute, third, and fourth wheels often need replacement; sourced from NOS or donor movements.
Setting Mechanism (Stem, Crown, Levers, Springs): Proper fit ensures seamless operation for winding and time setting.
Jewels: Synthetic ruby bearings help reduce friction and wear; replacements must match original specifications.
Hands and Dial Components: Authentic parts preserve the watch’s vintage aesthetics and collector value.
Sourcing and Maintenance Tips
Use original, NOS, or donor parts made specifically for the AS 5151 to maintain compatibility and durability.
Handle delicate components like the balance assembly with care during servicing.
Follow vintage watch servicing protocols for lubrication using synthetic oils sparingly.
Verify the calibre number on the movement before ordering parts to avoid mismatches.
Donor AS 5151 movements present valuable sources for rare or discontinued components.
Why AS 5151 Spare Parts Matter
Genuine parts maintain the calibre’s accuracy, shock protection, and smooth sweep seconds, vital for dependable vintage watch operation.
Authentic restoration preserves the historical significance and collector appeal of this Swiss mechanical movement.
Extensive technical data and watchmaker communities support efficient repairs and sourcing.
Maintaining your A. Schild AS 5151 calibre with quality spare parts ensures longevity 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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