Hamilton Watch Identification

Does anyone have familiarity with Hamilton watch models?

I picked up this Men’s Hamilton in a box lot at auction.

It appears to have a single piece case, although there does seem to to be 2 pieces, there is no notch to pry the case back off. There is corrosion around the edge, but no notch.

this leads me to believe the movement is accessed through the crystal. I do not own a crystal removal tool. I’d like to see the movement to help identify the model so I can list it for sale properly

It is an automatic movement and judging by the shape and size (33mm), I’m presuming 1960’s. Movement works.

it is a thin case, but does not have the stylized “thin-o-matic” logo on the face.

Stainless case

I found it using google lens, but it was misidentified as a different model

any help is greatly appreciated

 

It may be a tad earlier. Hamilton was using that logo in this 1958 ad. But certainly Atomic Age.

Debora

 

This guy will probably know the answer:
https://www.hamiltonchronicles.com/

 

The H logo on the dial seems be used from the 60s onwards. Prior to that I only find watches with the full name on the dial.
https://www.hamiltonchronicles.com/p/1940s-models.html
https://www.hamiltonchronicles.com/p/1950s-models.html
https://www.hamiltonchronicles.com/p/1960s-models.html