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A. Schild (AS) Calibre 1590 Watch Spare Parts: Technical Overview and Sourcing Guide
A. Schild (AS) Calibre 1590 is a vintage Swiss automatic mechanical movement notable for its reliable automatic winding system, compact design, and useful features such as small seconds and date display. It is a classic mid-20th-century calibre highly regarded among collectors and watchmakers restoring vintage automatic wristwatches.
Key Technical Highlights
Calibre: AS 1590
Movement Type: Automatic, self-winding mechanical
Diameter: Approximately 29.0 mm (13 lignes)
Height: Around 4.1 mm
Jewels: Typically 17 to 21 synthetic ruby jewels
Beat Rate: 18,000 vibrations per hour (vph)
Power Reserve: About 40 hours
Functions: Central hours and minutes, small seconds subdial at 6 o’clock, date window at 3 o’clock
Shock Protection: Equipped with Incabloc or similar anti-shock system
Production Era: Mid-20th century
Common Spare Parts and Components
Mainspring and Barrel: Essential for energy storage and smooth power delivery; replacements must precisely match original specs to maintain consistent torque.
Balance Wheel and Balance Staff: Critical for accurate timekeeping and shock resistance; require precise fit and high-quality replacements.
Rotor Assembly and Bearings: Integral to automatic winding; rotor bearings or axle replacements must be compatible to maintain winding efficiency.
Pallet Fork and Escape Wheel: Wear-prone escapement components; sourcing original or trusted new-old-stock (NOS) parts helps ensure reliability.
Gear Train Wheels (Minute, Third, Fourth): Often subject to wear or damage; donor movements and NOS parts are typical sources.
Setting Mechanism (Stem, Crown, Levers, Springs): Necessary for smooth winding, time, and date setting; must fit AS 1590 specifications exactly.
Jewels: Synthetic ruby bearings arranged to reduce friction; replacements must match original count and placement.
Hands and Dial Components: Period-correct parts help preserve vintage authenticity and collector appeal.
Sourcing and Maintenance Tips
Prefer original, NOS, or donor parts explicitly designated for AS 1590 to guarantee compatibility and authenticity.
Donor AS 1590 movements serve as valuable resources for rare or worn components.
Handle delicate parts like the balance wheel, rotor assembly, and escapement carefully during servicing.
Use modern synthetic watch oils sparingly and adhere to vintage lubrication standards to extend movement life.
Always verify the calibre number stamped on the main plate before ordering spare parts to avoid mismatches.
Why AS 1590 Spare Parts Matter
Using authentic or precise compatible parts preserves the calibre’s accuracy, automatic winding reliability, and longevity.
Proper part sourcing maintains the historical value and collector appeal of vintage Swiss automatic watches.
The AS 1590’s well-documented technical profile and community support facilitate easier sourcing and expert servicing.
Maintaining the A. Schild AS 1590 calibre with quality spare parts is vital for keeping these dependable vintage automatic movements running reliably and preserving their classic Swiss watchmaking heritage.