Seiko 6R21 Movement Details
Seiko caliber 6R21 is an automatic (with hand winding) watch movement. Production was in the 2020s.
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| Sub-brands: | Ananta, Presage |
| Power reserve: | 45 hours |
| Accuracy: | +25/-15 seconds/day (Seiko "C" standard) |
| Day / date? | Day + date |
| GMT / world time? | No |
| Chronograph? | No |
| Hacking? | Yes |
| Rate: | 28,800 bph |
| Number of jewels: | 29 |
| Lift angle: | 52º |
| Size / diameter: | 27.4mm |
| Height: | 6.15mm |
| Notes: | Has a power reserve indicator. |
| PDF guides: | Technical guide : 6R20A & 6R21A |
| Related movements: | 6R15 6R20 |
Part Codes
| Stem code: | 351200 (tap 10) |
| Balance wheel code: | 310048 |
| Mainspring code: | 201074 |
| Screw codes: | 012067 (case screw), 012168, 012201, 012354, 012420, 012919 (ratchet wheel screw) |