Seiko 5641 movement

Seiko caliber 5641 is a high grade automatic watch movement.

Sub-brands:Grand Seiko
GMT/world time?No
Chronograph?No
Hacking?Yes
Rate:28,800 bph
Number of jewels:25
Lift angle:56°
Development division:Suwa (Nagano)
Related movements: 5645 5646