Compound pliers patent applied for in 1948 and granted in 1952 to Homer Mead for Proto. The Proto version was number 234 and is pictured in AA. The ideas and advantages were many, according to the patent description, but the design was mainly intended to be easy to use and easy to apply compound gripping strength. I just like the Wizard design and the Camron, I've never seen before.

I have a pair of those Wizard pliers in my drawer of often used tool in the shop... love those things.

I just picked up my third pair of compound pliers last weekend. One pair is marked P&C and the other two are marked Proto. Same company. So they made some marked Challenger also. Got to keep a eye out for a pair of those now. I just found a extra stamping on the pair i just got. They are also stamped U.S. Maybe a military contract tool. Is that a U.S. stamp on your Camron pliers ?


EvilDr235 

It almost looks like an 8 in the picture, but it is US

Wow, I really love those Challengers, never seen them before. Nice score!