A. Schild (AS) Calibre 1827 Watch Spare Parts: Technical Overview and Sourcing Guide

A. Schild (AS) Calibre 1827 is a vintage Swiss automatic mechanical movement known for its reliable performance and versatility in mid-20th-century wristwatches. This calibre shares many design characteristics with the popular AS 1820 series, featuring robust construction and classic automatic winding mechanisms, making it a valued choice for collectors and watchmakers.
Key Technical Highlights

Calibre: AS 1827

Movement Type: Automatic, mechanical

Diameter: Approximately 11.5 lignes (25.60 mm)

Jewels: Typically 17, 21, or 25 synthetic ruby jewels

Beat Rate: Usually 18,000 vibrations per hour (vph)

Functions: Hours, minutes, sweep seconds, day/date complications commonly included

Shock Protection: Standard vintage anti-shock system, often Incabloc

Rotor: Ball-bearing type for smooth automatic winding

Common Spare Parts and Components

Mainspring and Barrel: Fundamental for consistent power delivery; sourcing original or new-old-stock (NOS) parts guarantees durability and correct torque.

Balance Wheel and Balance Staff: Precision parts critical for accurate timekeeping and shock absorption; exact fits to maintain performance.

Rotor Assembly and Bearings: Central to efficient automatic winding; worn components should be carefully replaced with original or high-quality NOS parts.

Pallet Fork and Escape Wheel: Essential escapement parts prone to wear; using authentic or NOS originals preserves smooth operation.

Gear Train Wheels (Minute, Third, Fourth): Often replaced due to wear or damage; typically sourced from donor movements or NOS inventories.

Setting Mechanism (Stem, Crown, Levers, Springs): Must fit precisely for proper winding, time, day, and date adjustments. The winding stem used for AS 1827 is often the original Swiss-made Part No. 401, compatible with several related calibres.

Jewels: Synthetic ruby bearings arranged to minimize friction; replacements should exactly match original layout to maintain calibre integrity.

Hands and Dial Components: Period-appropriate parts help maintain vintage authenticity and enhance collector appeal.

Sourcing and Maintenance Tips

Always use original, NOS, or donor parts specifically marked for AS 1827 to ensure full compatibility and preserve the quality of the movement.

Handle delicate components such as balance assemblies, escapements, and rotors with utmost care during repairs and servicing.

Apply modern synthetic watch oils sparingly and in accordance with vintage movement lubrication standards to ensure longevity and optimal functioning.

Verify the calibre number stamped on the main plate before ordering parts to avoid mismatches and compatibility issues.

Donor AS 1827 movements are valuable sources for rare, worn, or difficult-to-find replacement components.

Why AS 1827 Spare Parts Matter

Authentic spare parts maintain the calibre’s accuracy, reliability, and efficient automatic winding, essential for dependable wristwatch performance.

Proper restoration with genuine components preserves the historical significance and collectible value of these classic Swiss automatic watches.

Comprehensive technical documentation and an active watchmaker community facilitate effective parts sourcing and expert servicing.

Maintaining the A. Schild AS 1827 calibre with quality, original spare parts is vital to ensure these vintage automatic movements continue to perform smoothly while honoring their place in Swiss horological heritage.

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Stem, Crown, Hands & Spares might be available for this movement.

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