Help identify these lens mounts

I rencently picked up a couple lenses at a yard-sale, but I'm having trouble identifying the mount on one of them.

I'm fairly certain the one on the left is a M42 screw mount, but I'm having trouble identifying the one on the right. The threads are identical to the M42, but in additiona to the little pin, it also has 2 other rectangular solid pieces on the edge - one of which is longer than the other. Any help identifying these? See links below.. thanks!

http://img.photobucket.com/albums/v1...l/DSC_1748.jpg

http://img.photobucket.com/albums/v1...l/DSC_1749.jpg

Looks like third party lenses for a screw mount Ashia Pentax SLR camera late/early 1960/1970's. There are a few other cameras they could be.