06/24/2015 16:39
to me it looks as if someone has taken the body of a folding 6x9 camera to build a fixed one. the original opening of the film plane seems to be 6x9. if the lens comes from a 6x6 lubitel, it would not cover 6x9. so it makes sense to covert it, obviously to 6x4.5 (?), hence the necessity of a new red window for the new format.
the original body doesn't look homemade, maybe someone can identify it. perhaps it's a prototype, quite some companies building 120 film cameras tried to adapt their pruduction line compete with 135 film.