Prototype: Twenty-four (24) German Federal Railroad (DB) type Erz IIId four-axle hopper cars from the OOtz 41 design. Version with a high upper hopper, two unloading hatches per side, and end brakeman's platforms. Used to transport iron ore. Standard design welded pressed sheet metal trucks, with girders welded in place as reinforcement. The cars look as they did at the beginning of the Sixties.
The class 44 Öl heavy steam freight locomotives to go with these cars can be found under item numbers 39880 and 39882 in the Märklin H0 assortment.
A type Erz IIId hopper car set with twelve (12) more car numbers can be found in the Trix H0 assortment under item number 24129 along with information about the required AC wheelsets.