Seiko 5646 Movement Details
Seiko caliber 5646 is a high grade automatic watch movement produced from around 1970.
| Sub-brands: | Grand Seiko |
| Day / date? | Day + date |
| GMT / world time? | No |
| Chronograph? | No |
| Hacking? | Yes |
| Rate: | 28,800 bph |
| Number of jewels: | 25 |
| Lift angle: | 56º |
| Development division: | Suwa (Nagano) |
| Notes: | The same as cal. 5645 but with day display (as well as date). |
| Related movements: | 5641 5645 |