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A. Schild (AS) Calibre 1320 Watch Spare Parts: Technical Overview and Sourcing Guide
A. Schild (AS) Calibre 1320 is a vintage Swiss automatic mechanical movement featuring a sweep second hand, known for its reliable design and mid-20th century production. It is popular among vintage watch collectors and watchmakers for repair and restoration work.
Key Technical Highlights
Calibre: AS 1320
Movement Type: Automatic winding, mechanical
Diameter: Approximately 20.5 mm (about 9.25 lignes)
Height: Around 5.3 to 5.6 mm
Jewels: 17 synthetic ruby jewels
Beat Rate: 18,000 vibrations per hour (vph)
Power Reserve: Approximately 34 to 39 hours
Functions: Hours, minutes, sweep seconds, automatic winding with rotor
Shock Protection: Typically includes shock protection systems suitable for vintage automatics
Common Spare Parts
Mainspring and Barrel: Essential for power delivery; frequent replacement required due to fatigue or breakage in vintage movements.
Balance Wheel and Balance Staff: Vital for accuracy; delicate parts that may require precise replacement after shock damage or wear.
Rotor Assembly: Key automatic winding component; rotor bearings, pins, or axles may wear over time affecting winding efficiency.
Pallet Fork and Escape Wheel: Escapement components subject to wear; authentic or compatible parts ensure reliable operation.
Wheels (Minute, Third, Fourth): Common wear points; usually sourced from donor movements or new-old-stock (NOS).
Stem, Crown, and Setting Mechanism: Crucial for winding and time setting functions; wear-prone with age, needing exact fit replacements.
Jewels: Synthetic ruby bearings required for smooth gear operation and durability; must match original placement.
Hands and Dial Components: Period-accurate or restored parts maintain authenticity during restoration.
Sourcing and Maintenance Tips
Original or NOS Parts: Prioritize sourcing parts explicitly marked for AS 1320 to guarantee fit and authenticity.
Donor Movements: Salvage non-functional AS 1320 movements to obtain rare or hard-to-find parts.
Careful Handling: Delicate balance and escapement require expert handling during disassembly.
Lubrication: Use modern synthetic oils sparingly, respecting vintage lubrication standards.
Identification: The calibre number is generally engraved on the movement’s main plate or under the balance cock, essential for correct part ordering.
Why AS 1320 Spare Parts Matter
Reliable and Robust: Maintaining the AS 1320 with genuine parts preserves the movement’s renowned reliability and precise timekeeping.
Collector and Repair Value: Correct restoration with authentic components sustains vintage watch value and usability.
Watchmaker Familiarity: A recognized vintage calibre, AS 1320 benefits from established repair and parts sourcing networks.
The A. Schild AS 1320 remains a desirable automatic movement for vintage watch enthusiasts. Access to quality spare parts is crucial to keep these classic timepieces running authentically and reliably.