The Omm were lighter than the Länderbahnwagen and had a longer cargo space. The Omm Linz with only 1 meter high, From the end of the 1930s, hinged walls were designed and produced especially to meet the needs of the Wehrmacht. The Omm Villach on the The same base frame as the Linz had solid walls of 1.56 m height. In the Bundesbahn and DR the Linz as Omm 32 and the Villach classified as Omm 33 and later renumbered by the DB by modernization to Omm 42 or Omm 43
