EIther I've gone blind, or the pictures of the Makinon show a breechblock mount - probably a Canon FD, not a Pentax. You should contact the seller right away.
That Industar (which is a fun little lens, BTW) is really an M42 lens bundled with a "flanged" M42-PK adapter, which means it won't focus to infinity (it's like putting a 1mm macro extension tube on the lens). You'll need the flush-type adapter if you want infinity focus. You can find plenty of discussion of M42 adapters here on the forums.
Believe it or not, I've heard Ozunon was Montgomery Ward's house brand, although the camera wiki says it was a manufacturer, Ozone Optical. I've got one of their shorty-zooms. Small & decent, not spectacular.
Last edited by THoog; 07-08-2013 at 09:02 PM.
Reason: can't spell :p