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BFG (Baumgartner Frères) – mainsprings for all calibers
161 calibers with mainspring dimensions
Choose the caliber of your BFG movement. The caliber page shows the mainspring dimensions and – if in stock – the matching mainspring from our shop.
Note: We have transcribed this information to the best of our knowledge from the Générale Ressorts mainspring catalogue (GR 2, 1974). All information has been carefully checked but is provided without guarantee. Please check yourself before fitting that the mainspring fits, in particular height, diameter, thickness and length.
⚙️ All calibers
BFG 0–99
- 8
- 10
- 12
- 18
- 19 CL
- 19"
- 19" ST
- 20
- 25
- 25 B
- 29
- 29 B
- 30
- 33
- 34
- 34 C
- 34-1
- 34-2 10 1/2"
- 35 Ă 37
- 39
- 40 B 1
- 40 BCL
- 40 CL
- 42
- 42 B
- 42 BCL
- 42 CL
- 44
- 50
- 58
- 70 CL
- 78
- 80
- 85
- 90 Mouv
- 90 sonn
- 92
- 99 BCL
- 99 CL
- 99/8 13"
BFG 100–199
BFG 200–299
BFG 300–399
BFG 400–499
- 410/411 Ancre
- 410/411 Ancre & Rosk
- 410/411 Rosk
- 412/413 Ancre & Rosk
- 414/415 Rosk
- 416/417 Ancre & Rosk
- 418 Ancre
- 418 Rosk
- 445
- 448
- 480
BFG 500–599
BFG 600–699
BFG 700–799
BFG 800–899
BFG 900–999
BFG 1500–1599
BFG Other