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A. Schild (AS) Calibre 1149 Watch Spare Parts: Technical Overview and Sourcing Guide
A. Schild (AS) Calibre 1149 is a robust Swiss manual-wind mechanical movement from the mid-20th century, widely respected for precision and reliability. It is popular among vintage watch collectors and repairers due to its solid construction and classic design.
Key Technical Highlights
Calibre: AS 1149
Diameter: 29.00 mm (13 lignes)
Thickness: 3.80 mm
Jewels: Versions with 15, 16, 17, or 21 jewels
Beat Rate: 18,000 vibrations per hour (A/h)
Power Reserve: Approximately 41 hours
Winding: Manual wind, traditional yoke system
Shock Protection: Generally none or minimal on earlier variants
Common Spare Parts
Mainspring: Essential for providing power; prone to fatigue and breakage over decades and needs precise sizing for AS 1149.
Balance Staff and Balance Assembly: Delicate parts that control timekeeping accuracy; often require replacement if damaged due to wear or shock.
Pallet Fork and Escape Wheel: Components that experience wear and may require original or compatible replacements for correct escapement function.
Wheels (Minute, Third, Fourth): Wear and tooth damage are common; sourcing from donor movements or new-old-stock (NOS) is typical.
Stem, Crown, and Setting Mechanism: Critical for winding and time setting; tend to wear and may need original compatible replacements.
Jewels: Ruby bearings ensure smooth gear train operation; matching jewel count and placement is necessary for repairs.
Hands and Dials: Period-accurate parts maintain watch authenticity during restoration; these are often scarce and sourced from collectors or specialists.
Sourcing and Maintenance Tips
Original Parts: Recommended to use parts explicitly for AS 1149 due to specific dimensions and design.
Donor Movements: Non-working AS 1149 movements are valuable sources of spare parts, especially balance and wheels.
Compatibility: Some parts may interchange with similar AS calibers, but careful verification of fit is needed.
Handling: Careful disassembly and reassembly are crucial due to limited shock protection on many models.
Lubrication: Use suitable modern synthetic oils sparingly, respecting the original lubrication standards.
Why AS 1149 Spare Parts Matter
Durability and Precision: Maintaining original or authentic parts ensures the movement’s reliability and timekeeping accuracy.
Collector Value: Proper restoration with correct components preserves historical and monetary value.
Watchmaker Support: Being a classic movement, many watchmakers are familiar with the servicing requirements of AS 1149, facilitating repairs and sourcing.
A. Schild AS 1149 remains one of the prized manual movements in vintage horology, and sourcing quality spare parts is vital for keeping these exceptional timepieces operational and authentic.