Brand | Seiko |
Caliber Number | 6308, 6308A |
Base Caliber |
Seiko 6309A |
Movement Type | Automatic |
Lignes |
12”’ |
Diameter |
27mm |
Height |
5.2mm thick |
Jewels | 17 |
Vibrations Per Hour |
21,600 bph |
Power Reserve | 47 hours |
Lift Angle |
54.5 degrees (needs confirmed) |
Shock System | Diashock |
Rotor | Ball bearing |
Mainspring | 401615 |
Balance Staff | 311601 |
Hands | 1.5mm x 0.90mm x 0.20mm |
Hacking? | No |
Manual Winding? | No |
Winding Direction |
Bi-directional (Magic Lever) |
Functions | Hours, minutes, central seconds, quickset date at 3:00 |
Country of Manufacture | Japan |
Known Models | 6308 (add more in the comments below…) |
The Seiko caliber 6308A is a vintage automatic workhorse movement from the 1980’s and as far back as 1976.
6308A VS 6309A:
The caliber 6308A is based on the Seiko caliber 6309A. The main difference between these two movements is that the 6309A has a day/date complication at 3:00, whereas the 6308A only has a date at 3:00.
Additional Resources:
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