Went through quite some trouble to find me a black paint F with a plain prism and once I had it, I wondered 'what's the fuzz?' and let go of it.
There's two black paint, brassed and battered Nikkormats in my cabinet and I would not trade them for any other mechanical Nikon. They take any Nikkor lens, Pre-AI, AI, AIs, AF, AF-S, you name it. I gave one to a friend, looked like it had been used as a hammer and was stuck. He fixed it in <5 mins and it worked.
When it comes to sexy, I like it when they go on and on and on 😛😀😛😀