This is a Johnson Controls A70GA-2 controller. More info:
35-80F set points, close on rise for cooling only. Adjustable differential of 3-30F.
It has two sets of contacts. The main is good for 16amp at 120v and it closes at the set point. There's a set of aux contacts good for 6amps at 120v and opens at the set point.
The temp sensing bulb is 6 feet.
It's working fine, I'm only selling because I scored a A419 electronic controller in a craigslist lot and wanted to use that instead. This is a great controller for either a freezer kegerator or a fermentation fridge.