Stainless Steel back, I'm leaning towards Jet Clipper or Clipper.
Having the discussion here about the 1950-60s waterproof models.
Jet Clipper and Clipper were selfwinding, it is not, I would say it is a Sea King. I have seen advertising for automatic and hand winding Sea King watches.
ad is Dated 1966 http://www.mybulova.com/sites/default/files/uploaded_photos/user2196/sking%2Cb%2Cc.%20dec.%201966.jpg
I agree with Sea King ID
Sea King 'AH' is also a very close match (minus the whale)