A. Schild (AS) Calibre 5202 Watch Spare Parts: Technical Overview and Sourcing Guide
A. Schild (AS) Calibre 5202 is a Swiss automatic mechanical watch movement known for its precision, robustness, and reliability. Introduced around 1975, it is a trusted calibre that features a diameter of 27.6 mm and operates at 21,600 vibrations per hour (3 Hz), with a power reserve of approximately 39 hours. These qualities make the AS 5202 a popular choice among vintage watch enthusiasts and professional watchmakers.
Key Technical Highlights
Calibre: AS 5202
Type: Automatic, mechanical
Diameter: 27.6 mm (12 lignes)
Jewels: 17 synthetic ruby jewels
Beat Rate: 21,600 vibrations per hour (3 Hz)
Power Reserve: Approximately 39 hours
Lift Angle: 50°
Era: Circa 1975
Common Spare Parts and Components
Mainspring and Barrel: Original or New-Old-Stock (NOS) mainsprings and barrels maintain power consistency and durability.
Balance Wheel and Balance Staff: Critical for precise timekeeping and shock protection; genuine replacements ensure reliability.
Pallet Fork and Escape Wheel: Wear-prone escapement components require NOS or original replacements for smooth operation.
Gear Train Wheels: Minute, third, and fourth wheels commonly replaced; sourced from NOS stock or donor movements.
Setting Mechanism (Stem, Crown, Levers, Springs): Proper fitting parts are necessary for smooth setting and winding.
Jewels: Synthetic ruby bearings used to reduce friction; replacements must match original layout.
Hands and Dial Components: Authentic parts maintain vintage aesthetics and preserve watch value.
Sourcing and Maintenance Tips
Use original, NOS, or donor parts designed for AS 5202 to ensure compatibility and optimal function.
Handle delicate components such as the balance and escapement with care to avoid damage during servicing.
Use appropriate synthetic lubricants sparingly, following vintage watch servicing practices.
Verify the calibre number on the movement before ordering parts to avoid errors.
Donor AS 5202 movements are excellent sources for rare or obsolete parts.
Why AS 5202 Spare Parts Matter
Genuine parts maintain the movement’s accuracy, durability, and smooth automatic winding, essential for vintage watch reliability.
Authentic restoration preserves the historical significance and collector appeal of this classic Swiss calibre.
Rich technical documentation and active watchmaker communities aid efficient sourcing and repairs.
Maintaining your A. Schild AS 5202 calibre with quality spare parts guarantees lasting performance and honors its horological heritage.
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Stem, Crown, Hands & Spares might be available for this movement.
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