I found this in a local antique store last week for $5.00. I ordered a c-mount adapter from ebay and it arrived today. I can't find anything about this lens. The Graf lens company was bought in 1936, so it's older than that, but otherwise I come up with very little. Graf was famous for it's soft focus lenses... this appears to be one of them. And here is the lens mounted on my E-P1.