SPRING FOR REGISTER RING
For Seiko 4N20-1000
721/186
Alternate: INCA/ETA 980
Movement Listing
This part is also used by the following movements:
| Movement | Description | Ligne |
|---|---|---|
| Fleurier 660 | 18,000 BPH | 5.5 x 6.75 |
| Seiko 5P31-5170 | SEIKO CASE REFERENCE COSERVE 2003/2004 |
