SEAG delivered the first two test Cars from the SSlma44 class in 1934. They were produced using St 52 and each had a removable brakeman�s cab manufactured from wood or steel. The further deliveries up until 1939, also produced using St 52, were equipped with three cross-members and seven stake pairs. An amended version was built from 1941 onwards. This version now consisted of the weaker St 37 which meant that a fourth cross-member had to be included. The Car now had eight lateral stake pairs. For vehicle transports, the brakeman�s cab now only had a foldable platform railing. A total of approx. 3, 500 Cars were built before the end of the war. After 1945, the welded rail carriages were distributed throughout half of Europe. Equipping these carriages with new bogies is still common in France. At the end of the war, DB had approximately 1, 400 Cars in the inventory and it is estimated that DR had about 500.