I do possess a spare Fed-S #70883 with lens cup and authentic leather case at the moment. Shutter sounds to work good at all speeds. Anyway it's a collectable camera only, I can not guarantee its accuracy. I'm ready to sell my Fed-S for 200 euros plus actual shipping or to swap for something I'm interested in .
This sounds interesting. I've sent you an email, if you didn't receive it please contact me through the forum again. Sorry, I've had some trouble with mail lately.