I don't follow. Why is a Nikon F with plain prism and a pre-AI 50/1.4 an incongruous pair? The differing amounts of wear? It sounds like they were made for each other to me. I have the same exact combination -- my F is an early one with a 64xxxxx serial number, but I still think they go together quite naturally. Oh, I suppose some might quibble that my lens should be a 5cm instead of a 50mm, but I pretty much ignore this sort of thing.