[noah]

Most Seiko Dive lovers know about the 6309 movement found in the famous 6309 divers but once in a while something strange comes up ..
This is a 6349A 23 Jewels movement ....
also uses the same rotor as the 6309 ...

 

[Isthmus]

Here is the technical manual for it from our manuals section:

[size=1em]6349A.pdf