What mount is this? Access 35-70mm P-MC
Hi guys, I just received an Access P-MC Zoom 35-70mm lens. I was told by the seller it was most likely K-mount but on receiving it it won't fit and after looking up various mounts it looks closest to is the Rikoh R/K mount. However it seems to be missing the silver colored backplate that lets it attach to the camera. So yeah, I'm befuddled. Any help? Sorry for the blurry phone photo, looks like it really wanted to focus on something else.