I have 75b 4.5 with just purchased with paper work confirming tested 1996 thats a few years its been stashed, its a beaut , double action cleaner than any unfired or un reworked i have ever shot, clean 4.5 trigger , crisp, with truglo night sights and wrap around grips, 4 digits with a P after the digits ?? any ideas Thanks Razzle.... i do enjoy my CZ rifles and pistols