Originally posted by Harry Moto It certainly looks like a Pentax MX in black, but it's missing the 'MX' logo that would be on the right side of the lens AND the depth of field preview lever. Hmmm... Otherwise it's a dead ringer.
So I looked it up, (Hello, Google Images) and it could be an MX or an ME, the only visible difference from the front is the Logo, which is missing. Actually, I thought it might be MY old MX when I noticed the notches on the prism cover! Mine had a hard life, worked great until some time in the '90s, despite actual DENTS in the prism cover and various physical evidences of abuse. I miss it.
What it the image is reversed? There isn't anything on the other side, could be left/right reversed. I guess? Already spent way too much time thinking about this! LOL
If you look at the shape of the prism of the MX I think it's narrower at the top than this body.
Pentax MX - Pentax Manual Focus Film SLRs - Pentax Camera Reviews and Specifications
I've got the ME. MX, LX, Super A, Program A, and MZ-5N, P50 and MG, and I don't think it's any of those. I also have the K2 wich has a prism most like this one....But very hard to be sure.