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A. Schild (AS) Calibre 1506 Watch Spare Parts: Technical Overview and Sourcing Guide
A. Schild (AS) Calibre 1506 is a vintage Swiss manual-wind mechanical movement, prized for its reliable construction, moderate size, and precise timekeeping. Produced around the mid-1950s, it is favored by collectors and watchmakers restoring classic wristwatches from that era.
Key Technical Highlights
Calibre: AS 1506
Movement Type: Manual wind, mechanical
Diameter: Approximately 23.7 mm (10.5 lignes)
Jewels: 17 synthetic ruby jewels
Beat Rate: 18,000 vibrations per hour (vph)
Lift Angle: 52 degrees
Power Reserve: Approximately 45 hours
Functions: Hours, minutes, direct central seconds
Period of Use: Around 1955
Common Spare Parts and Service Needs
Mainspring and Barrel: Essential for power storage and consistent energy delivery; replacements must match the AS 1506 specifications for proper function.
Balance Wheel and Balance Staff: Key precision components for accurate timekeeping; delicate parts that require exact sizing and compatible shock protection.
Pallet Fork and Escape Wheel: Wear-prone escapement parts that must be replaced with genuine or new-old-stock (NOS) components for reliable operation.
Gear Train Wheels (Minute, Third, Fourth): Commonly affected by wear or damage; sourced from donor movements or NOS parts.
Setting Mechanism (Stem, Crown, Setting Levers, Springs): Crucial for accurate winding and time setting; parts must exactly fit AS 1506 dimensions.
Jewels: Synthetic ruby bearings placed precisely to minimize friction and wear, replacements must match original configuration.
Hands and Dial Components: Period-correct or original parts maintain watch authenticity and collector value.
Sourcing and Maintenance Tips
Prioritize authentic or NOS spare parts specifically marked for AS 1506 to guarantee compatibility and maintain movement integrity.
Salvage donor AS 1506 movements for rare or worn components, especially balance assemblies and gear train parts.
Exercise careful handling during servicing due to the delicate nature of the balance and escapement assemblies.
Use modern synthetic oils sparingly, adhering to vintage watch lubrication standards for longevity and optimal performance.
Confirm the calibre number stamped on the main plate before ordering parts to avoid mismatches.
Why AS 1506 Spare Parts Matter
Maintaining genuine or compatible parts preserves the calibre’s accuracy, reliability, and historical value.
Proper restoration upholds the watch’s collector appeal and authentic vintage character.
AS 1506 is well-documented in watchmaking resources, facilitating parts sourcing and technical support.
Keeping the A. Schild AS 1506 calibre properly serviced with quality spare parts is essential for preserving the legacy of these classic Swiss manual-wind watches, ensuring their ongoing reliable function and collectible status.