Zetor was founded in the town of Brno, in the Czech Republic. The town has had a metal works since at least the mid-1800s. During World War II, the factory was pressed into service to produce munitions for Germany, until it was destroyed by bombing in 1944. The factory staff had begun making plans for production after the war, and the model 25 tractor was the result. Zetor was an early developer in four-cylinder diesel engines, diesel injection, factory-built cabs, and mechanical front-wheel drive (MFWD). Because of this, and their low cost, Zetor tractors were exported through the world. Zetor also licensed production to factories in India and Iraq in the 1950s and 60s.
Zetor - official site
Zetor World - specifications and history on Zetor tractors