The two CZs were different factories prior to the fall of the Communist Bloc, but parts of a larger organization.
I'll borrow from Fjestad's brief history:
Ceska Zbrojovka means Czech Weapons Factory. The current company is Ceska Zbrojovka a.s. Uhersky Brod, abbreviated as CZUB a.s. (meaning joint stock company). Zbrojovka Brno means weapon or gun factory located in Brno.
Ceska Strakonice was created in 1923, to take over handgun production previously done in Brno.
Ceska Strakonice developed the CZ-24, 27, 50, and 52. During the 50's the Strakonice factory was converted to building motorcycles and precision instruments.
The Czech government shifted producton of long guns from Zborojvka Bron to Cezka Zbrojovk Uhersky Brod, where firearms made up less than 3% of its total production.
Things changed again in the 80's and trademarks were moved around. CZUB designed and built the original CZ-75.
The CZ TT guns are using the CZ Strakonice trademark and piggybacking on its history. But keep in mind, that THAT CZ never built the CZ line of guns now known as the 75, and that they are simply using the name. The guns are apparently pretty good, but clones with some parts built by Tanfoglio. They are NOT true CZs, but are capitalizing on the old history and name.
The newest guns coming ADCO will soon be imported form Turkey -- more clones of the CZ.
CZ-USA is a wholly-owned subsidiadry of CZUB.
