Hot Rods Questions about an Old Set of Traction Bars

I took them off a '57 Chevy about 25 years ago, planning to put them on mine, but couldn't get them to work (whether that was due to the new leaf springs having more arch, or 15 year old ineptitude, I'm not sure). I just found them again last weekend, in the trunk of a "parts car" that I am now about to rebuild. Any idea who made them?

 

Design sure looks like Traction Masters.

 

I'm no expert,but I had a pair of Traction Masters that looked just like those

 

Traction Masters
http://tractionmaster.com/

 

Cool, thanks!