Seiko 7S55 Movement Details

Seiko caliber 7S55 is an automatic watch movement produced in the 2000s.

Sub-brands: Seiko 5, Superior
Day / date?Date only
GMT / world time?No
Rate:21,600 bph
Number of jewels:23
Lift angle:53º
Size / diameter:27.0mm
Balance wheel code: 310020, 310197
Mainspring code: 201024
Notes: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 for 7S25A, 7S35A & 7S55A
Related movements: 7S25 7S26 7S35 7S36