Ikarus Machine- and Metal Products Company () Hence the Ikarus Body- and Vehicle Factory () was created on 8 February. However, the company's products still did not bear the name Ikarus until 1951, although the winged logo started to appear even on the Tr 5 models, built after 1949, and the three other models, not using the company name. As a result of the war, there was shortage of chassis in Hungary, but at the same time there was a growing need for buses, as most of them were destroyed or severely damaged during the Siege of Budapest. The engineers were forced by the circumstances to develop a bus model without chassis. The result was the model Tr 3,5 with a unibody construction in 1948, which was the first in the world of its type. Some sources suggest the German Setra S8 as the first with such unibody construction, but that model was only started to be built in 1950. The small Tr 3,5 weighted only 3,7 tonnes – hence the name – and was 7.73 metres in length. The engine was produced by Rába, but at the time the company could only produce some pre-war models, that were used for their own – at this point obsolete – bus model, the Special. During this short period, Ikarus had ambitious plans, as they designed two different bus models exclusively for export goals. One of these was the A19, which was designed with Southern-American standards in mind. It was built on a 10.5 metres long chassis, and every single passenger seat was rendered next to a window. The model was also full of decorations. Despite of all the attempts, only two prototypes of the model were built, and both of them remained in Hungary. The other attempt for export was much more successful. This model was called the M5 and was built on the same chassis as the Tr 5, but received a redesigned front, manually operated swing doors and somewhat more passenger seats. A total number of 170 of the model were produced, out of which 90 were sold to Poland, 45 to Romania, and even though it was intended to be an export model, 35 to the Hungarian company MÁVAUT. Models between 1951 and 1967 In 1951, after a long and heated argument between the engineers and the political decision makers on whether unibody or body-on-frame vehicles should be