MAINSPRING, (WEAK)
For Seiko 2F70-5340
721/516
Discontinued: Yes, use MSN-30
Movement Listing
This part is also used by the following movements:
| Movement | Description | Ligne |
|---|---|---|
| Seiko YM62-X122 | ||
| Citizen 4-491220 | CITIZEN CASE | |
| Lucien Piccard 48 | 10.5 | |
| Seiko YM62-X122 |
