Felsa 4004 Watch Spare Parts: Comprehensive Guide for Collectors and Watchmakers
The Felsa 4004 is a Swiss automatic watch movement featuring a bumper winding system, widely used in the mid-20th century. Measuring 11.5 lignes (26.3 mm) in diameter and 5.6 mm in thickness, this calibre is known for its reliable performance, featuring 17 to 30 jewels depending on specific variants. It operates at 18,000 vibrations per hour (vph) and offers a power reserve of approximately 44 hours. The movement includes a sweep seconds and date functionality, making it an important calibre within the Felsa family.
Key Technical Specifications
Calibre: Felsa 4004
Movement Type: Automatic (bumper winding)
Jewels: 17 to 30 synthetic rubies
Frequency: 18,000 vph
Diameter: 26.3 mm (11.5 lignes)
Thickness: 5.6 mm
Power Reserve: Approx. 44 hours
Functions: Hours, minutes, sweep seconds, date
Common Spare Parts
Balance Assembly: Complete balance including hairspring and staff for precise time regulation
Mainspring: New Old Stock (NOS) mainsprings recommended for consistent power delivery
Rotor & Axle: Bumper rotor and pivot components essential for automatic winding
Stem & Crown: Precise fit essential for winding, time setting, and date adjustment
Gear Train Components: Center, third, fourth, and escape wheels ensuring smooth power transmission
Date Mechanism Components: Date wheel, jumper spring, and quickset parts for calendar function
Hands & Dial Components: Compatible hour, minute, sweep second hands, and date display parts
Jewels: Synthetic rubies reduce friction and wear on critical pivots
Clicks & Springs: Ratchet wheels, click springs, and bumper springs provide winding functionality and security
Bridges & Plates: Provide structural integrity and precise component alignment
Maintenance and Sourcing Tips
Verify the “4004” calibre designation before ordering parts for accuracy
Use NOS or verified donor components to maintain originality and watch value
Source from reputable vintage watch part dealers and trusted suppliers
Employ Swiss-certified lubricants and professional servicing for durability
Importance of Genuine Spare Parts
Ensures precision, longevity, and authentic preservation
Maintains collector value and mechanical reliability
Supports expert repairs and dependable daily use
Utilizing genuine spare parts is crucial for preserving the Felsa 4004’s legacy as a precise, robust Swiss automatic calibre appreciated by 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