Mainspring for Seiko 401-430
Height, diameter, thickness and length
1.45 Ă— 10.5 Ă— 0.125 Ă— 440 mmheight Ă— diameter Ă— thickness Ă— length
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.
📏 Mainspring dimensions
| GR no. | Height | Diameter | Thickness | Length | Type |
|---|---|---|---|---|---|
| 4007-D | 1.45 mm | 10.5 mm | 0.125 mm | 440 mm | Hand-wound, off-centre end hook (D) |
All dimensions in millimetres. The height of a mainspring is often also called its “width”. Source: Générale Ressorts, mainspring catalogue GR 2 (March 1974), page 172.
đź›’ Matching mainspring in our shop
According to the catalogue, this mainspring has a special form (Hand-wound, off-centre end hook (D)). We therefore do not show shop items automatically here – feel free to write to us. Contact form