Thanks, Seele, for the information. I am going to buy this lens and see what it is. I suspect that it is actually an Exakta mount rather than a bayonet Edixa. In searching the internet I ran across a picture of an Edixa SLR with Exakta mount front and the current owner questions the origin. He thinks it is a machinist's project camera, but it looks factory original.

gma