C22, that should be a really cool camera, kind of a poor man's Rolleiflex. Yet far better than the simpler Yashica Mat (we'd destroy those in college). I believe one or more of the later C220 or C330 models had changeable Twin-Lens assemblies. That is something over Rolleicord and Rolleiflex.
IF you look closely at the OP's photo, you'll see that this camera does have interchangeable lenses.
Oops, I should have mentioned that I also found this at the same time!
Those Kodak Photo Guides are fun. I have a lot of different ones with many mechanical/paper dial calculators. Many are still useful or at least interesting or thought provoking. Some are actual book(lets), other are stand-a-lone like yours. Great finds!