Seiko 7S55 Movement Details

Seiko caliber 7S55 is an automatic watch movement. Production was in the 2000s.
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Sub-brands:	Seiko 5, Superior
Power reserve:	41 hours
Accuracy:	+45/-35 seconds/day
Day / date?	Date only
GMT / world time?	No
Chronograph?	No
Hacking?	No
Rate:	21,600 bph
Number of jewels:	23
Lift angle:	53º
Size / diameter:	27.0mm
Height:	4.9mm
Notes:	The same as cal. 7S35 but with decorative "Tokyo Stripes" rotor and higher grade finish, for use in the Seiko 5 Superior range with display backs.
PDF guides:	Technical guide : 7S25A, 7S35A & 7S55A
Related movements:	7S25 7S26 7S35 7S36

Part Codes

Stem code:	351260 (tap 10), 354176
Balance wheel code:	310020, 310197
Mainspring code:	201024
Screw codes:	012123 (stud screw), 012168, 012354, 012420, 012539 (second reduction wheel screw), 012919 (ratchet wheel screw), 016705