Lens Mount Help! Please?

[kino_pravda]

So, I'm going through a bunch of old stuff recently and I found this movie camera lens I got a long time ago and never got around to finding a use for. The thing is, I don't really know what kind of lens mount this lens goes with and I don't know where to ask, so I figured I would try this forum.

Here are some pictures of the lens:

Can anyone here tell what kind of lens mount this lens would go with just by looking at it? If not, is there somewhere else I should look to find out? There aren't many camera shops where I live and I doubt any with experience with movie camera lenses, so the internet is really my only hope for identification.