The pre-First World War cars had a distinctive front shape caused by positioning the radiator behind the engine to give a so-called "coal scuttle" bonnet. This continued through the 1920s. Only in 1930 did all models place the radiator at the front. The bonnet badge changed from circular to the familiar and continuing diamond shape in 1925. The practice of installing the radiator behind the engine against the firewall continued during the 1950s and 1960s on vehicles where the engine was installed longitudinally in the rear of the vehicle.