Seiko 3102 Movement Details
Seiko calibre 3102 is an electronic watch movement. Production started around 1969.
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| Sub-brands: | 31EL |
| Day / date? | Date only |
| GMT / world time? | No |
| Chronograph? | No |
| Rate: | 21,600 bph |
| Development division: | Suwa (Nagano Prefecture, Japan) |
| Notes: | Unlike later electronic watches, uses contacts rather than a transistor. |