Seiko 6156 Movement Details

Seiko caliber 6156 is a high grade automatic (with hand winding) watch movement. Production started around 1970.
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Sub-brands: Grand Seiko
Day / date?Day + date
GMT / world time?No
Chronograph?No
Hacking?Yes
Rate:36,000 bph
Number of jewels:25
Lift angle:54.5º
Size / diameter:27.0mm
Height:5.65mm
Stem code: 354616
Balance wheel code: 310617
Mainspring code: 201595
Date wheel code: 801615
Screw codes: 022150 (stud screw), 022252, 022269, 022270, 022271, 022351, 022372, 022458 (screw for oscillating weight), 022468, 022662, 022677, 022689, 022760, 022761 (dial screw)
Development division:Suwa (Nagano)
Notes:The same as cal. 6155 but with day display (as well as date).
Related movements: 6145 6146 6155

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