Seiko 4005 Movement Details

Seiko caliber 4005 is an automatic watch movement produced from around 1968 until 1969.

Sub-brands: Bell-matic
Day / date?Date only
GMT / world time?No
Chronograph?No
Hacking?No
Rate:19,800 bph
Number of jewels:27
Notes:The same as cal. 4006 but with date display only (no day). It has a 10-second mechanical alarm feature powered by a second mainspring.
Related movements: 4006