Felsa 720 Watch Spare Parts: Detailed Guide for Collectors and Watchmakers
The Felsa 720 is a Swiss manual wind watch movement widely used in the 1950s, known for its compact size and reliable function. This calibre measures 8.75 lignes (approximately 19.40 mm) in diameter, operating at 18,000 vibrations per hour (vph) with 17 synthetic jewels. It offers a power reserve of approximately 40 hours, making it a practical choice for slim wristwatches requiring manual winding.
Key Technical Specifications
Calibre: Felsa 720
Movement Type: Manual wind
Jewels: 17 synthetic rubies
Frequency: 18,000 vph
Diameter: 19.40 mm (8.75 lignes)
Power Reserve: ~40 hours
Functions: Hours, minutes, sub-seconds or sweep seconds (varies with sub-model)
Common Spare Parts
Balance Staff: Essential for reliable oscillations and accurate timekeeping
Mainspring: New Old Stock (NOS) recommended for consistent power delivery and durability
Stem & Crown: Precision fit required for reliable winding and setting
Gear Train Components: Includes center wheel, third wheel, fourth wheel, and escape wheels to ensure smooth gear train function
Hands & Dial Parts: Original or compatible hour, minute, and sub-second/sweep second hands
Jewels: Synthetic rubies reduce friction and wear on pivots
Clicks & Springs: Ratchet wheels and click springs for secure winding operation
Bridges & Plates: Structural components providing stability and accurate alignment
Maintenance and Sourcing Tips
Verify the “720” calibre marking before purchasing spare parts to ensure compatibility
Choose NOS or verified donor parts to maintain originality and collector value
Obtain parts from trusted vintage watch suppliers and reputable online sources
Use Swiss-certified lubricants and professional servicing for optimal lifespan
Importance of Genuine Spare Parts
Guarantees precision, reliability, and preservation of authenticity
Maintains the watch’s collector appeal and mechanical integrity
Facilitates expert repairs and dependable daily use
Using authentic spare parts is vital for preserving the Felsa 720’s legacy as a reliable, compact Swiss manual wind calibre appreciated among watchmakers and collectors.
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]
Mobile/WhatsApp: +91- 9841 360 340