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Otero – mainsprings for all calibers
72 calibers with mainspring dimensions
Choose the caliber of your Otero 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
Otero 0–99
- 10 1/2"
- 22 8 3/5 x 12"
- 22 A
- 25 5 1/4"
- 25 CLD
- 26
- 26 CLD
- 26 SC 12"
- 27 6 3/1 x 8"
- 28
- 29
- 29 A
- 29 SC 10 1/2"
- 30
- 30 CLD calend
- 30 SC 12"
- 37
- 39
- 40
- 40 SC 10 1/2"
- 41
- 41 SC 11 1/2"
- 44
- 45 SC 10 1/2"
- 46
- 48 11/2" Aut
- 56 5 1/4"
- 62
- 64
- 70 Ă 74
- 77
- 78 Aut
- 79 Aut
Otero 100–199
Otero 200–299
Otero 300–399
Otero 400–499
Otero 500–599
Otero 700–799
Otero 800–899
Otero 1300–1399
Otero 1400–1499
Otero 1700–1799