Seiko 6139 Movement Details

Seiko caliber 6139 is an automatic watch movement. Production started around 1969.
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Sub-brands: Seiko 5, Speed Timer
Power reserve:45 hours
Day / date?Day + date
GMT / world time?No
Rate:21,600 bph
Number of jewels:17 or 21
Lift angle:54.5º
Size / diameter:27.0mm
Stem code: 354615, 354617, 357612
Balance wheel code: 310611
Mainspring code: 401616
Development division:Suwa (Nagano)
Notes:World's first automatic chronograph to market. It has a column wheel and vertical clutch for more precise stopwatch measurement. Similar to cal. 6138 but without the chronograph hand to measure elapsed hours.
PDF guides: Technical guide : 6139A
Technical guide : 6139B
Related movements: 6138