Felsa 21 Watch Spare Parts: Essential Guide for Collectors and Watchmakers
The Felsa 21 is a classic Swiss manual wind movement dating from the early 20th century, celebrated for its precision and mechanical reliability. Used circa 1910, the calibre features a bimetallic screw balance, Breguet hairspring, moustache lever, and wolf teeth winding gear. It sports 15 to 22 jewels, with a power reserve of 35–36 hours and a frequency of 18,000 vibrations per hour (vph). Its compact size (diameter: 19.75 mm, height: 3.4 mm) and robust construction make it a desirable piece for vintage watch restorers.
Key Technical Specifications
Calibre: Felsa 21
Movement Type: Manual wind, sub-seconds
Jewels: 15–22 synthetic rubies
Power Reserve: 35–36 hours
Frequency: 18,000 vph
Diameter: 19.75 mm (mounting diameter may vary between 13.5–19.75 mm)
Height: 3.4 mm
Era: ca. 1910
Essential Spare Parts
Balance Staff: Ensures stable timekeeping and precision regulation
Mainspring: New Old Stock (NOS) options favored for long-term reliability
Stem & Crown: Proper winding and setting depend on correct fitment and compatibility
Gear Train Components: Center wheel, third wheel, fourth wheel, escape wheel all crucial for accurate movement
Hands & Dial Components: Original hour, minute, sub-seconds hands, and dial feet for secure mounting
Jewels: Synthetic rubies at pivots reduce friction, extend watch lifespan
Clicks & Springs: Essential ratchet wheels, click springs for smooth winding and operation
Bridges & Plates: Structural support to maintain layout and part stability
Sourcing and Maintenance Tips
Always confirm calibre “21” by inspecting movement and reference sheets before sourcing parts
Prefer NOS or genuine donor parts for authenticity and collector value
Use specialized vintage watch parts dealers and trusted online catalogues for reliable sourcing
Regular cleaning and lubrication with Swiss-certified products are crucial for optimal function
Importance of Genuine Spare Parts
Guarantees hedge against wear, preserves accuracy and historical value
Maintains Swiss craftsmanship standards and collector appeal
Supports restoration for robust, long-lasting daily wear
Preserving the Felsa 21’s legacy depends on sourcing and utilizing genuine spare parts, ensuring authenticity and reliability for generations of watch enthusiasts.
For any Watch Spare Parts inquiry, Email us for rate and availability: [email protected]
Watch Parts Enquiry
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Stem, Crown, Hands & Spares might be available for this movement.
Email us for rate and availability: [email protected]
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