Seiko 9721 Movement Details
Seiko caliber 9721 is a high grade analog quartz watch movement. Production started around 1979.
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| Sub-brands: | King Quartz |
| Battery: | SR1130SW / 390 (Silver oxide) |
| Accuracy: | ±20 seconds/year |
| Day / date? | No |
| GMT / world time? | No |
| Chronograph? | No |
| Hacking? | Yes |
| Rate: | 32,768 Hz |
| Number of jewels: | 2 |
| Size / diameter: | 26.0mm |
| Height: | 2.9mm |
| Development division: | Daini (Kameido, Tokyo, Japan) |
| Notes: | Twin quartz for greater accuracy. The same as cal. 9722 but without date display. |
| Related movements: | 9722 9723 |