Dyna / Brown-Brockmeyer Bench Grinder Questions

[sbklf]

I bought this grinder from an estate. I was able to find a picture of one just like it on the internet to determine it is either a Dyna or a Brown-Brockmeyer (or both) but some of the information was conflicting. Hoping someone can help with a couple questions:
-Is it a 6" or 7" grinder? (NOTE: A 7" grinding wheel fits in the guard shroud with about 5/8"space all the way around)
-Is it 1/2 HP? (NOTE: It draws 4 amps at 120V not loaded and without grinding wheels mounted)
-Might someone be able to help with Klixon wiring? (NOTE: The Klixon was bypassed and #2 tab broken off. I will replace it but not sure how to wire it)

 

[sbklf]

Was not able to find a Klixon designed to operate on current only. Everything I see relies on a combination of current draw and the heat generated by the windings (designed to be in the motor shell). So I installed a 15amp breaker I had instead, I will change it to a 10 amp if I can find one to be closer to the current draw.