Seiko 5256 Movement Details

Seiko caliber 5256 is a high grade automatic (with hand winding) watch movement. Production started around 1973.
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Sub-brands: King Seiko
Day / date?Day + date
GMT / world time?No
Chronograph?No
Hacking?Yes
Rate:28,800 bph
Number of jewels:25
Lift angle:52º
Size / diameter:25.6mm
Height:4.2mm
Stem code: 354026
Balance wheel code: 310034
Mainspring code: 201054
Date wheel code: 801029
Screw codes: 012121 (stud screw), 012284, 012285, 012354, 012513 (ratchet wheel screw), 012672, 012673, 012677, 012679, 012726 (case screw), 012744, 012753, 012770
Development division:Daini (Kameido, Tokyo)
Related movements: 5206

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