 In addition to the passenger coaches, 917 Pwi luggage vans also appeared between 1923 and 1931 to a similar design.From 1930 several Di-21 coaches were converted to heavy hand luggage vans ("Traglastenwagen").In 1930 and 1934, 28 Cid-21/21a coaches had simple post compartments fitted, they were designated as class C Postid-21/34 and, later, as B Postid-21/34.