Vintage 75 ATM SSW questions

[ncmoto]

Hello all, Could a member tell me if this bezel is correct and what do the dial markings @ 10/11
1/2 ect indicate? Is this a late version? Thanks for any other insight   Best Ken

[ncmoto]

sorry here is the pic

[Butch]

It is a later 70's or early 80's version. The dial markings were used with the dive tables that came with it to calculate diving time to the depth.

A nice watch in very good condition. Is it yours?

[ncmoto]

Thanks Butch! Im just about to pick it up. Wrist shots soon  Best Ken