Yups, the dust may look ugly, but the fingerprint on a lens is a no-go. I doubt if invisible or very hardly visible haze would have the power to really reduce contrast much, and it would be worse or better depending on light direction. Here, it's not the case. Unlike the developer that lacked the time or the power to really rise and even out the curve, which could worsen the situation quite evenly...

What's funny, here: http://www.sovietcams.com/index.php?-1424201095 they write about Jupiters. Mine version, apparently, is not there, I have PT3080 body, but with markings in cyrilic, from 1968 (I've got it with a body with matching date). Should I report it to those folks? I seriously doubt if it's rare, it looks totally normal, though the screw they've used in the leather case is really obnoxious, so maybe I have a kind of "leftover camera"...

I guess if we're into dating lenses and talking about contrast, this Zorki is a keeper?
If you plan to shoot some more soon, makeshift DIY lenshood may be of interest:
http://www.zorkikat.com/2009/07/what...upiter-lenses/