armored, you do know that a large number of CZ-70s are merely refurbed 50's, right? The CZ-50 was not based on the PP as the ONLY two things they have in common are that they are blow back and double action. There is a mild similarity in appearance, but this is shared by most blow-back pistols with the recoil spring around the barrel.
The CZ-70 does have relation to the current company, so does the CZ-50, as both pistols were built at the Uhersky Brod location. Indeed, following the ending of CZ-52 production at Strakonice, CZ-50 production started back up again, but this time at Uhersky Brod (a few were made at CZ-Praha). Therefore, the very first pistols produced by the factory where current CZ's are produced was the CZ-50, followed by the CZ-70 (any 6-digit CZ-70 is a rebuilt CZ-50, by the way). The first pistol designed there, however, was the CZ-75 (it even had CZ-70 style grips), followed by the VZ-82 and CZ-83 (there are very slight differences in the pins as well as markings, but that is all).
The CZ-52 has nothing to do with the Uhersky Brod factory, as they were all produced at Strakonice, nor were the early CZ-50s.
As for autos, I do consider the CZ-75 to be one of the absolute greatest 9mm's ever made.
Ash