My collection includes:

F- chrome early model and bought by my father in the early 60s with T model Photomic
F- chrome later 60s model with eye level prism, T Photomic, waist level viewfinder
F2AS- black

28mm f/3.5 Auto
28mm f/2 AI
28mm f/2 AI
50mm f/1.8 Auto
50mm f/1.4 Auto
50mm f/1.2 AI

I LOVE my Fs.