And another one.
Zbrojovka means armoury, in the sense of an arms manufacturer. These cars were made by Československá zbrojovka of Brno, who started out making mainly rifles and machine guns, but apart from Z cars, also went on to make Zetor tractors and Consul typewriters. Not to be confused with Česká zbrojovka of Strakonice, who started out making mostly pistols, but went on to produce ČZ motorcycles.