I am selling a new, replacement Exakta lens mount. If you've shot with Exakta's for a while, you may have noticed their bayonet mounts tend to wear out with use faster than they should and the lenses get a little wobbly when mounted. I bought two of these a long time ago to fix this problem with my Exakta's. This one was left over. Uncommon today! Price: $15 plus shipping