Thanks Steve, it was used as a reverse light switch in the 40s. I saw variations that were labeled for heat, parking lights and hazards as well. These are similar to ark-les switches. They are really just a lighted on off switch. I chose it because I could stick it in the stock dash holes and fit a stock wiper knob over top. A fog light switch hidden in plain sight.

So next question is how do I wire that in?
B to power in F to lights T ground?