The hardware (knobs and such) is a bit different from the D45A and D45M, but the standards look a lot like those cameras. It looks like it's on a short extension rail instead of a full length. From these angles, it's difficult to say if it has geared shifts though (a feature of the D45M) or if it has only dovetail slides (D45A type). Regardless, it's a nice looking camera and would use all of the current bellows, lensboards, and backs. Oh yes, that is a bail style back and not a universal (Graflok) type back on that camera. I would agree with Dave that it's probably from the 1970s.