dub dub dub dot mpmuseum.org/postwarequipment3.html
Its museum which is good for education purposes, but it is also a Meathead museum, so the whole notion of learning is lost on them.
The Canadian SMG 9mm C1 was/is a very good postwar SMG. Probably the best until the appearance of the H&K MP series of guns. (Yes, and I say better than an UZI.) The change lever on S would lock the breechblock closed so a loaded magazine could be carried safely. It also had an R for single shot. As stated, ours were always black Parkerized finish, not crinkly.