[QUOTE=ntenny;1498915]That seems shockingly bad to me. A full stop off? Mine both came to me after a CLA (Oleg Khalyavin) and the speeds were spot on. No reason for them not to be, as far as I can tell; the timing mechanism for the fast speeds is really simple, so if they're severely off, either the shutter tension isn't even between the curtains (which would make for uneven exposures across the frame) or something is seriously interfering with the shutter speed rod.
Did you do your own CLA? If so, I'm curious if you have any guesses as to where the timing problem is coming from.
Did you measure the shutter speed yourself? I measured the speed as well as the 1st and 2nd curtain travel times. I did clean and lube the camera but I've done so many times. I believe the mechanisms are just worn. When I was working on the cameras, I removed the light shields to see if they were impeding the shutters but it made no difference. On one of my Zorki C cameras I wound up the first curtain as much as possible - knowing that I might break the spring - but it only increased the speed about 1/3 of a stop. Not surprisingly, the curtain travel times are quite slow - more than 2x a 70's SLR. I've never been able to find any specifications for curtain travel time for a Zorki/FED or early Leica.