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A. Schild (AS) Calibre 1192 Watch Spare Parts: Technical Overview and Sourcing Guide
A. Schild (AS) Calibre 1192 is a vintage Swiss manual-wind mechanical movement, respected for its robust design and reliable performance during the mid-20th century. It is used in a variety of wristwatches and remains a sought-after caliber for collectors and watchmakers restoring vintage timepieces.
Key Technical Highlights
Calibre: AS 1192
Movement Type: Manual wind, mechanical
Size: Approximately 10.5 lignes (about 23.5-24 mm diameter)
Jewels: Typically 17 jewels
Beat Rate: 18,000 vibrations per hour (vph)
Power Reserve: Around 40+ hours, depending on condition
Winding Mechanism: Traditional manual winding with yoke system
Shock Protection: Some variants include Incabloc or similar shock protection on the balance wheel, but earlier versions may lack it or have minimal protection
Common Spare Parts Needed
Mainspring and Barrel: Critical for consistent power and timekeeping; fatigued mainsprings or worn barrels typically require replacement to restore functionality.
Balance Wheel and Balance Staff: Fragile and essential for precision; broken or bent balance staffs, or damaged balance wheels, require exact replacements.
Pallet Fork and Escape Wheel: High-wear escapement components that often need servicing or part replacement for smooth operation.
Gear Train Wheels: Minute, third, and fourth wheels can wear or accumulate damage and are replaced with correct AS 1192 parts, often sourced from donor movements.
Stem, Crown, and Setting Components: Worn or bent key components in the setting and winding system require exact spare parts to ensure proper operation.
Jewels: Replacement ruby bearings must match the original jewel count and positioning to maintain movement durability and friction reduction.
Hands and Dial: Period-appropriate hands and dials are essential to preserve authenticity during restoration; often sourced from specialist suppliers or vintage parts.
Sourcing and Service Tips
Donor Movements: Salvaging parts from non-functional AS 1192 movements is a common and reliable method to obtain authentic spares like wheels, escapement parts, and balance assemblies.
New Old Stock (NOS): Some critical parts such as mainsprings, jewels, or winding crowns may be available as NOS from specialist vintage watch part dealers.
Compatibility: While some parts from nearby AS calibers may fit, it is recommended to use parts explicitly for AS 1192 to ensure precision fit and optimal performance.
Careful Handling: Given the mechanical nature and vintage status, delicate components like the balance and escapement require expert watchmaker handling during disassembly and servicing.
Lubrication: Use modern synthetic watch oils sparingly, following vintage watch servicing standards to avoid damage or excessive wear.
Why AS 1192 Spare Parts Matter
Reliability and Performance: Maintaining original-type parts ensures that the movement runs smoothly, retains its power reserve, and keeps accurate time.
Collector Value: Correct restoration using authentic parts preserves the movement’s historical integrity and magnetic appeal for collectors.
Watchmaker Familiarity: AS 1192 is well documented and known in vintage watch servicing communities, facilitating access to technical information and suitable spares.
A. Schild AS 1192 embodies Swiss mid-century mechanical watchmaking excellence. Sourcing quality spare parts is essential for keeping these classic movements functional and true to their original design.