I found a huge difference between an early (1959) Kiev 4a and a later (1980's) Kiev 4am. The earlier Kiev was much smoother and more Contax-like in its operations.
“Believe nothing, no matter where you read it or who has said it, not even if I have said it, unless it agrees with your own reason and your own common sense.” – quote
I myself am made entirely of faults, stitched together with good intentions. -quote