BFG – Baumgartner 34 Watch Spare Parts: Complete Guide
The Baumgartner BFG 34 is a Swiss-made, manually wound, pin lever movement commonly found in vintage, affordable wristwatches from the mid-20th century. Its robust design and simple mechanics make it accessible for both collectors and repairers.
Key Technical Specifications
Calibre: BFG 34
Movement Type: Manual hand-wind
Diameter: 10.5 lignes (approx. 23.3–23.9mm)
Beat Rate: 18,000 vibrations per hour (vph)
Escapement: Pin lever (Roskopf type)
Jewels: Typically 1 (can be up to 17 in later variants)
Shock Protection: None
Functions: Hour, minute, small seconds (decentralized)
Winding System: Yoke mechanism with the setting lever spring (simple and robust)
Balance: Nickel annular, controlled by a long regulator arm
Common Spare Parts
Mainspring and Barrel: Drives the entire gear train and is essential for reliable performance.
Balance Wheel and Staff: Core for timekeeping accuracy; authentic replacements restore stability.
Pallet Fork and Escape Wheel: Critical for the escapement and often a wear point in pin lever movements.
Winding Stem & Crown: Needed for smooth manual winding; split and yoke mechanisms must be matched.
Base Plate, Train Wheels, and Bridges: May require replacement in watches with considerable wear.
Hands and Dial Components: Original or reproduction parts preserve the watch’s vintage appearance.
Small Seconds Parts: As the seconds sub-dial is decentralized, make sure replacements are compatible.
Maintenance and Sourcing Tips
Use original or NOS (New Old Stock) parts for longevity.
Donor movements are commonly used for rare parts.
Avoid excessive lubrication; pin lever escapements require only light oils.
Confirm BFG 34 marking on the dial/movement before ordering to ensure compatibility.
Importance of Genuine Parts
Genuine spare parts are essential for reliability and authentic restoration.
They maintain the value, precision, and historical character of vintage BFG 34 watches.
Resources and parts are widely available due to the movement’s popularity.
Maintaining your Baumgartner BFG 34 with original components ensures lasting function and preserves its Swiss watchmaking legacy.
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Watch Parts Enquiry
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Stem, Crown, Hands & Spares might be available for this movement.
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