Thompson's. Must be a good place to eat, since someone shot out the poster. The menu:

We so strongly associate fast food chains with hamburgers that it may be surprising to learn that Thompson’s popular sandwiches included Cervelat, smoked boiled tongue, cold boiled ham, hot frankfurter, cold corned beef, cold salmon, and Herkimer County cheese, served on “Milwaukee Rye Bread” baked by the chain’s bakery.

Oh, yum. More on the chain here.