Seiko 5646 Movement Details
Seiko caliber 5646 is a high grade automatic watch movement. Production started around 1970.
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| 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 |
| Size / diameter: | 25.6mm |
| Height: | 4.5mm |
| Development division: | Suwa (Nagano Prefecture, Japan) |
| Notes: | The same as cal. 5645 but with day display (as well as date). |
| Related movements: | 5641 5645 |
Part Codes
| Stem code: | 354560 |
| Balance wheel code: | 310561 |
| Mainspring code: | 401565 |
| Date wheel code: | 801560 |
| Screw codes: | 022150 (stud screw), 022252, 022257, 022373, 022454, 022458 (screw for oscillating weight), 022467, 022482, 022484, 022486, 022662, 022667, 022673, 022674, 022753, 022761 (dial screw) |
Related Articles
- A Grand Seiko 5646-7000 from June 1970: the third generation automatic Grand Seiko [adventuresinamateurwatchfettling.com]