Truck is an Opel Blitz. Rosenbauer did bodywork similar to this one in the 1960's but I cannot verify if this truck is also a Rosenbauer. They would carry usually 1,000 liters of water.
It is a German Opel Blitz chassis cab from the 1960s. No idea about the bodybuilder. These were quite popular in Germany and the Netherlands, and had a 6 tonne GVW, which meant either no water tank or a rather small one.
This is an Opel Blitz with TEMAX bodywork built in Greece, based on Rosenbauer drawings. In 1967-1968 the first fire fighting vehicle cab in Greece was built by TEMAX Company completely from scratch, for a delivery of 80 fire fighting vehicles on Opel Blitz chassis with 4 door crew cab. On 1967, after a newly established cooperation with Konrad Rosenbauer KG, TEMAX founder P. TANGALAKIS CORP., was the exclusive distributor for Rosenbauer products in Greece. BTW, double crew cab extensions of conventional cabs followed by TEMAX on International, Magirus and Mercedes Benz chassis.
Added by Simon Hilliam on 27 December 2016.