Hamilton 975, Display Back

This Hamilton 975 is in a "salesmen's case".  There is a crystal on both the front and the back.  The case is an actual Hamilton case, "Hamilton" appearing near the stem on both the front and the back.

 Interestingly, the case is snap front and back.  The front bezel is actually quite difficult to remove.  Since this is a lever-set movement, that means that presumably the salesman would have been unable to demonstrate setting the watch.

More about display back cases here...