Seiko 7M22 Movement Details
Seiko caliber 7M22 is a kinetic (formerly AGS) watch movement. Production started around 1987.
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| Battery: | 3023.24R (replaces 3029.110) / (Rechargeable capacitor) |
| Accuracy: | ±15 seconds/month |
| Day / date? | Date only |
| GMT / world time? | No |
| Chronograph? | No |
| Number of jewels: | 5 |
| Size / diameter: | 27.0mm |
| Height: | 4.2mm |
| Stem code: | 351670 (tap 11) |
| Date wheel code: | 801954 (black on white), 801956 (black on white), 878508 (black on gold) |
| Screw codes: | 022247, 022417 (screw for oscillating weight) |
| Development division: | Suwa (Nagano) |
| Notes: | The world's first kinetic watch movement, using an oscillating weight that converts the wearer's motion into electricity. Although it was announced in January 1988, some models have 1987 production dates on the caseback. Has a low energy indicator function. |
| PDF guides: | Technical guide : 7M22A |