This is a model of the steam locomotive, road number 99 5902, for the German State Railroad. It is a finely detailed model in heavy metal construction with many separately applied details. The locomotive is driven with two powerful motors and all driving wheelsets are driven using coupling rods. The doors to the cab and smoke box door can be opened. The finely detailed Mallet design running gear has many details such as complete valve gear and a propulsion mechanism for the lubrication pump. The prototypical black/red paint scheme and lettering is for Era IV as the locomotive looked at that time in use on the DR. All of the differences compared to the present day version are modelled. The model like the original has no air pump, since the locomotive was equipped with a vacuum pump. The different pathways for the lines on the boiler are also modelled according to the prototype. The locomotive is equipped with an mfx/DCC decoder with many light and sound functions such as headlights, cab lighting, running sounds, a whistle and a bell activated by reed switches, as well as much more. The running sounds will also work in analog operation. There is a built-in smoke unit with smoke exhaust synchronized with the wheels as well as cylinder steam and steam exhaust at the whistle when the latter is activated. There are digitally controlled LGB couplers at both ends, and these couplers can be removed. There are sprung buffers. Length over the buffers 40 cm / 15-3/4.