Seiko 5646 Movement Details

Seiko caliber 5646 is a high grade automatic watch movement produced from around 1970.

Sub-brands: Grand Seiko
Day / date?Day + date
GMT / world time?No
Chronograph?No
Hacking?Yes
Rate:28,800 bph
Number of jewels:25
Lift angle:56º
Development division:Suwa (Nagano)
Notes:The same as cal. 5645 but with day display (as well as date).
Related movements: 5641 5645