This is a carefully thought out, well executed, sturdy camera. I am very fond of these old do everything press cameras. This has no focal plane shutter. They were rarely used when they were present.
I've seen may of the C models and thought about getting one but with the Adapt-a-roll I can shoot 6x9 with the D. Still may get one though. They are very sturdy and should hold up for another 60-70 years. I've started making my own lens boards for these and now have 3 different lenses for the model D.