In the 1964, the new "P-601" was launched. This is the most famous Trabant, the model that's remained in production for almost 30 years, without important modifications. The coachwork is always in plastic. The "P-601" was an example of extreme essentiality: no valves, no camshaft, no timing belt (the engine is a two stroke), no oil pump, no water pump, no radiator (air cooled)! The gearbox has four speeds (three on the previous "P-50"); there is the electronic ignition, and the Trabant, even in this great simplicity, was one of the first cars with this system.