BFG – Baumgartner 921 Watch Spare Parts: Detailed Overview
The Baumgartner BFG 921 is a renowned Swiss automatic watch movement appreciated for its precision and durability. This calibre, measuring approximately 9 lignes (21.9 mm diameter), is distinguished by its self-winding mechanism, compact size, and robust construction, making it a preferred choice for vintage automatic watches.
Key Specifications
Calibre: BFG 921
Movement Type: Automatic self-winding
Size: Approx. 9 lignes (21.9 mm diameter)
Beat Rate: 18,000 vibrations per hour (vph)
Jewels: Varies (typically multiple synthetic jewels for durability)
Functions: Hours, minutes, sweep seconds, day-date complications in some variants
Balance: Nickel anular balance with shock protection options
Power Reserve: Approximately 44 hours
Construction: Mix of pillar and massive construction ensuring mechanical robustness
Common Spare Parts
Mainspring and Barrel: Original or New Old Stock (NOS) mainsprings crucial for constant power supply.
Balance Assembly: Balance wheels, staffs, hairsprings, and regulators for accurate timekeeping and durability.
Rotor and Automatic Winding Components: Rotor, winding gears, and reverser wheels for automatic winding functionality.
Escape Wheel and Pallet Fork: Essential escapement parts for smooth operation.
Gear Train Wheels: Power transmission components including center, third, and fourth wheels.
Calendar and Date Mechanism: Date wheels, day discs, jumpers, correctors, and springs (if applicable).
Setting and Winding Components: Stem, crown, setting levers, and springs for manual winding and setting.
Hands and Dial Components: Vintage-style or compatible replacements preserving original aesthetics.
Screws, Plates, and Bridges: Structural components maintaining movement stability.
Maintenance and Sourcing Tips
Verify Baumgartner BFG 921 calibre marking before purchasing spare parts for exact compatibility.
Use NOS or donor movements to source rare or discontinued parts.
Handle automatic winding and escapement components with care during servicing to avoid damage.
Lubricate precisely with oils suited to automatic vintage movements.
Sourcing parts from specialist vintage watch dealers ensures authenticity.
Importance of Genuine Spare Parts
Genuine parts provide accuracy, durability, and reliable performance.
Preserve the historical value and collector appeal of your vintage automatic timepiece.
Essential for quality restoration and sustained watch functionality.
Maintaining your Baumgartner BFG 921 with authentic spare parts ensures long-lasting performance and honors its legacy in Swiss watchmaking.
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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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