The Mack B61 is one of the most famous trucks of the fifties: it was produced from 1953 to 1966 in about 130,000 units. It was available with petrol or diesel engine and with different chassis length, 4x2 or 6x4 configuration. The 4x2s were used as a semi-trailer tractor while the 6x4 versions were mostly haulage or bucket trucks.