Like you Tony, I don't need another F2. I have had mine since 1982. I want another, but don't need one.
Ken, I'll have to take a look. What it does is the needle jumps when I move the aperture to around f/5.6. Seems to work fine at the other f/stops. Kind of afraid to take the prism finder apart though. I am pretty good at getting things apart, one of the best actually. It's the second half of the process that I suck at.