This was something I found in a box of stuff at a garage sale.
No identifying marks. Doesn't look hand made. Looks like it was meant to be fastened to a piece of flat stock.
(http://i50.tinypic.com/ezjp86.jpg)
(http://i49.tinypic.com/dqrm36.jpg)
(http://i45.tinypic.com/4rxqn6.jpg)
I don't know , but looks like it's used to hold something for a machining operation.
It kind of looks like the clamps I have seen for holding band saw blade stock together for brazing.