Hi Zach and welcome to the forum!
This looks like an OJ2577 Seamaster to me. Mechanical Bumper Movement should be inside.
The Bumper movements are the predecessors of our today's automatic movements.
You can find more info about the watch here:
http://naligazone.com/index.php/data-watch/omega/caliber-3/cal-354/ck-2577
Only way to be certain thou is to have it opened up by a watchmaker and take a picture of the movement and inside of the caseback (there you will find the reference number).
Cheers,
Max
Click to expand...