Seiko 8306 Movement Details
Seiko caliber 8306 is an automatic (with hand winding) watch movement. Production started around 1965.
| Sub-brands: | Business-A, Weekdater, Seikomatic-R, Sea Lion, Seikomatic |
| Day / date? | Day + date |
| GMT / world time? | No |
| Chronograph? | No |
| Rate: | 18,000 bph |
| Number of jewels: | 30 |
| Size / diameter: | 28.6mm |
| Height: | 4.8mm |
| Development division: | Suwa (Nagano Prefecture, Japan) |
| Notes: | The same as cal. 8305 but with day display (as well as date). Unusually, the date is quickset in both directions, and the day is set by repeatedly moving the hour hand backwards and forwards past midnight. The automatic winding mechanism does not use Seiko's famous "magic lever" system – instead it has an integrated wheel system, making the movement slimmer. |
| Related movements: | 830 8305 8346 840 |
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- Seiko 8306-8020 [thewatchbloke.co.uk]
- The Seiko Calibre 8306A [thewatchspotblog.com]