



FEF-Fleurier 6665.1.M8.ST Watch Spare Parts: Comprehensive Guide for Collectors and Watchmakers
The FEF-Fleurier 6665.1.M8.ST is part of the distinguished Fleurier family of Swiss manual wind watch movements. Known for robust construction and precision engineering, this calibre measures approximately 6.75 x 8 lignes (about 15.35 x 18.2 mm) and features 17 synthetic rubies. Operating at 21,600 vibrations per hour (vph), it provides a power reserve of roughly 47 hours with stem winding and setting (“ST”) capabilities, and the M8 denotes a specific technical variant for improved functionality.
Key Technical Specifications
Calibre: FEF-Fleurier 6665.1.M8.ST
Movement Type: Manual wind, stem winding and setting
Jewels: 17 synthetic rubies
Dimensions: ~6.75 x 8 lignes (15.35 x 18.2 mm)
Frequency: 21,600 vph
Power Reserve: About 47 hours
Escapement: Swiss pallet lever
Shock Protection: Typically Incabloc
Common Spare Parts
Balance Staff: Fundamental for precise oscillations and timekeeping accuracy
Mainspring: New Old Stock (NOS) mainsprings preferred for stable power delivery
Stem & Crown: Precision fit for smooth winding and hand setting
Gear Train Components: Center, third, fourth, and escape wheels ensuring efficient power transmission
Clicks & Springs: Ratchet wheels, click springs, and setting levers for secure operation
Jewels: Synthetic rubies reduce pivot friction and wear
Hands: Period-appropriate hour and minute hands preserve vintage authenticity
Bridges & Plates: Offer structural integrity and precise component alignment
Maintenance and Sourcing Tips
Verify the “FEF 6665.1.M8.ST” marking before ordering parts to guarantee compatibility
Use NOS or trusted donor parts to retain the watch’s authenticity and reliability
Source parts from reputable dealers specializing in vintage watch components
Employ professional servicing and Swiss-certified lubricants for optimal performance
Importance of Genuine Spare Parts
Ensures reliable mechanical function, durability, and authenticity
Maintains collector value and preserves original watch integrity
Supports expert restoration and dependable daily use
Using genuine spare parts is essential to uphold the FEF-Fleurier 6665.1.M8.ST’s reputation as a reliable, precise manual wind calibre treasured by collectors and professionals alike.
For any Watch Spare Parts inquiry, Email us for rate and availability: [email protected]
Watch Parts Enquiry
* If you are unable to fill out any of the required information fields, please type “N/A”.
Stem, Crown, Hands & Spares might be available for this movement.
Email us for rate and availability: [email protected]
Mobile/WhatsApp: +91- 9841 360 340