Re: CZ 52 number prefix
It only has crossed swords with 53 over them on the right side. There is a Z on the left side of the trigger guard right next to the grip that I assume is an armorer code.
"Americans have the right and advantage of being armed - unlike the citizens of other countries whose governments are afraid to trust the people with arms." (James Madison, The Federalist Papers #46 at 243-244)
"I have sworn upon the altar of God eternal hostility against every form of tyranny over the mind of man."