I acquired this rotary punching machine a few years ago from Eli at Landis. I have been unable to find any literature on it. Here is what I know. It was distributed by C.S. Osborne and sold for $40.00 back in the day. I know this because Osborne was kind enough to send me a copy of the ad. It is fun to use and, since I love old leather equipment, I think very cool. Does anyone know where I might find more literature of information on this fine piece of equipment?