Long story-
Several years ago, a guy called me to come ID a "wrench" at a local bar. I went there and looked at this contraption, spent a lot of time trying to figure it out, drank three beers in the process, took pictures, and left not knowing what the hell it was!
Months later at a tool show in Houston, a guy had one on his table, but he didn't know either, and he had been carrying it around several years trying to find out what it was!
I bought it for $20, just for the "cool" factor. I posted it on Tool Talk as a "What's-It", and in just a day or two had the answer. Later, Lynn Dowd discovered that he had one also. An old member of the forum showed us his, and told us what it was. I now have three of them for some reason, two similar and one a little different. Yours is even a little more different.
Still haven't had time to find the pictures.