While visiting a friend wh's liqudiating a huge collection, I saw this lying on the table and asked what is it. He thinks it's Bing. With two rails it would seem to be some sort of mechanical control device.
I said to him I think I can restore it (operationally) and he said take it. So now I've got an interesting mechanical project, but what can I do with it after fixing ?
I hope someone recognaizes this metal contraption.