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BFG- Baumgartner 921-31 Watch Movement spare parts
| BFG- Baumgartner 921-31 – Part No. 100 Plate 8 3/4 |
| BFG- Baumgartner 921-31 – Part No. 100 Plate 21.90mm |
| BFG- Baumgartner 921-31 – Part No. 106 Barrel and lrain wheel bridge |
| BFG- Baumgartner 921-31 – Part No. 121/3 Balance cock for stud holder and antishock |
| BFG- Baumgartner 921-31 – Part No. 125 Pin pallet cock |
| BFG- Baumgartner 921-31 – Part No. 180 Barrel with arbor |
| BFG- Baumgartner 921-31 – Part No. 195 Barrel arbor |
| BFG- Baumgartner 921-31 – Part No. 201/1 Center wheel and pinion |
| BFG- Baumgartner 921-31 – Part No. 210 Third wheel and pinion |
| BFG- Baumgartner 921-31 – Part No. 211 Double Third wheel and pinion |
| BFG- Baumgartner 921-31 – Part No. 220 /1 Fourth wheel and pinion without second hand bit |
| BFG- Baumgartner 921-31 – Part No. 243 Cannon pinion |
| BFG- Baumgartner 921-31 – Part No. 250 Hour wheel |
| BFG- Baumgartner 921-31 – Part No. 275 Sweep second Pinion |
| BFG- Baumgartner 921-31 – Part No. 307/1 Regulator for adjustable stud holder,for flat hairspring |
| BFG- Baumgartner 921-31 – Part No. 364 Stud holder for flat hairspring |
| BFG- Baumgartner 921-31 – Part No. 370 Antishock jewelled, upper |
| BFG- Baumgartner 921-31 – Part No. 371 Antishock jewelled, lower |
| BFG- Baumgartner 921-31 – Part No. 372 Antishock 2 jewels, upper |
| BFG- Baumgartner 921-31 – Part No. 373 Antishock 1 jewel, lower |
| BFG- Baumgartner 921-31 – Part No. 401 Winding stem |
| BFG- Baumgartner 921-31 – Part No. 404 Winding stem for waterproof case |
| BFG- Baumgartner 921-31 – Part No. 407 Clutch wheel |
| BFG- Baumgartner 921-31 – Part No. 410 Winding pinion |
| BFG- Baumgartner 921-31 – Part No. 415 Ratchet wheel |
| BFG- Baumgartner 921-31 – Part No. 420 Crown wheel |
| BFG- Baumgartner 921-31 – Part No. 422 Crown wheel ring |
| BFG- Baumgartner 921-31 – Part No. 434 Click spring |
| BFG- Baumgartner 921-31 – Part No. 435 Yoke |
| BFG- Baumgartner 921-31 – Part No. 440 Yoke spring |
| BFG- Baumgartner 921-31 – Part No. 443 Setting lever |
| BFG- Baumgartner 921-31 – Part No. 498 Supporting masse |
| BFG- Baumgartner 921-31 – Part No. 451 Setting wheel for minute wheel |
| BFG- Baumgartner 921-31 – Part No. 466 Lid for winding and setting mechanisms |
| BFG- Baumgartner 921-31 – Part No. 469 Hour wheel guard |
| BFG- Baumgartner 921-31 – Part No. 733 Colleted hairspring |
| BFG- Baumgartner 921-31 – Part No. 770 Mainspring |
| BFG- Baumgartner 921-31 – Part No. 790/2 Pin escape wheel for upper end-piece |
| BFG- Baumgartner 921-31 – Part No. 792 Balance staff for roller |
| BFG- Baumgartner 921-31 – Part No. 793 Balance with roller, regulated |
| BFG- Baumgartner 921-31 – Part No. 797 Pin pallet fork for roller |
| BFG- Baumgartner 921-31 – Part No. 799 Roller |
| BFG- Baumgartner 921-31 – Part No. 5102 Case pin |
| BFG- Baumgartner 921-31 – Part No. 5106 3/4 plate bridge screw |
| BFG- Baumgartner 921-31 – Part No. 5121 Balance cock screw |
| BFG- Baumgartner 921-31 – Part No. 5125 Pin pallet cock screw |
| BFG- Baumgartner 921-31 – Part No. 5415 Ratchet wheel screw |
| BFG- Baumgartner 921-31 – Part No. 5420 Crown wheel screw |
| BFG- Baumgartner 921-31 – Part No. 5435 yoke screw |
| BFG- Baumgartner 921-31 – Part No. 5466 Lid screw, for winding and setting mechanisms |
| BFG- Baumgartner 921-31 – Part No. 5750 Dial screw |
| BFG- Baumgartner 921-31 – Part No. 5750-1 Dial screw aside |
| BFG- Baumgartner 921-31 – Part No. 51142 Screw for bridge of automatic device |
| BFG- Baumgartner 921-31 – Part No. 51142-1 Screw for bridge of automatic device |
| BFG- Baumgartner 921-31 – Part No. 51143 Bridge Screw for oscillating weight |
| BFG- Baumgartner 921-31 – Part No. 1142 Upper bridge lor automatic device |
| BFG- Baumgartner 921-31 – Part No. 1143 Oscillating weight |
| BFG- Baumgartner 921-31 – Part No. 1427 Tension click |
| BFG- Baumgartner 921-31 – Part No. 1448 Tension click spring |
| BFG- Baumgartner 921-31 – Part No. 1449 Winding-up wheel |
| BFG- Baumgartner 921-31 – Part No. 1481 Reduction gear |
| BFG- Baumgartner 921-31 – Part No. 1482 Driving gear, mounted for ratchet wheel |
| BFG- Baumgartner 921-31 – Part No. 1500 Wig-wag pinion |
BFG – Baumgartner 921/31 Watch Spare Parts: Comprehensive Overview
The Baumgartner BFG 921/31 is a Swiss automatic watch movement prized for its precision, compact design, and reliable mechanical construction. It belongs to the Baumgartner 921 family, known for vintage automatic calibres with sweeping seconds and date functions.
Key Specifications
Calibre: BFG 921/31
Movement Type: Automatic self-winding
Size: Approximately 9.75 lignes (21.5 mm diameter)
Beat Rate: 21,600 vibrations per hour (vph)
Jewels: Typically 1 synthetic jewel
Functions: Sweep seconds, date function with time-based setting (21:30–24:00)
Power Reserve: Around 44 hours
Balance: Nickel anular balance with shock protection
Date Setting: Date set by changing time between 21:30 and midnight for quick correction
Common Spare Parts
Mainspring and Barrel: Original or New Old Stock (NOS) mainsprings for consistent and durable power.
Balance Assembly: Balance wheel, staff, hairspring, and regulator maintaining precise timing.
Rotor and Automatic Winding Parts: Rotor, winding gears, and reverser wheels critical for automatic operation.
Escape Wheel and Pallet Fork: Essential escapement parts for smooth mechanical movement.
Gear Train Wheels: Power transmission wheels including center, third, and fourth wheels.
Date Mechanism: Date discs, jumpers, springs, and locking levers allowing reliable date changes.
Setting Mechanism: Stems, crowns, setting levers, and springs for manual winding and time setting.
Hands and Dial Components: Authentic vintage-revision or replacement parts maintaining original style.
Screws, Plates, and Bridges: Structural parts ensuring assembly integrity.
Maintenance and Sourcing Tips
Verify the BFG 921/31 calibre marking for ordering correct spare parts.
Prefer NOS or reliable donor parts for lasting performance and compatibility.
Handle automatic winding and date mechanisms gently during servicing to prevent damage.
Lubricate with suitable oils specifically formulated for vintage automatic movements.
Trusted vintage watch parts suppliers offer a broad selection of Baumgartner components.
Importance of Genuine Spare Parts
Guarantees accuracy, longevity, and reliable operation of the watch.
Maintains the historical and collector value of this vintage Swiss timepiece.
Supports professional restoration and long-term wearability.
Using authentic parts for your Baumgartner BFG 921/31 ensures precise function and preserves its place in Swiss horological heritage.
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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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