Narrow gauge locomotives were also derived according to the standard design principles from the standardized DRG procurement program for standard gauge steam locomotives at the end of the Twenties. In 1930, Schwartzkopff delivered three units with ten driving wheels as road numbers 99 221-223, which at that time were the most powerful narrow gauge steam locomotives on the. Only road number 99 222 survived the war, and it is still use in approximately the same condition on the HSB.
This is a model of the steam locomotive, road number 99 222, for the Harz Narrow Gauge Railways (HSB) in the same version as the locomotive currently is in use. The paint scheme and lettering are prototypical for Era VI. All five sets of driving wheels are driven from two powerful motors. The locomotive is equipped with an mfx/DCC decoder with many light and sound functions such as headlights that change over with the direction of travel, cab lighting, or running gear lighting that can be controlled separately. There is a whistle and a bell activated by reed switches and that will also work in conventional operation. There is a built-in smoke unit with smoke exhaust synchronized with the wheels as well as cylinder steam. There are many separately applied details. The cab is fully detailed, and the doors can be opened. A sheet of lettering with modelling of the plaque for the special runs for the 125th anniversary of the Brocken Railroad is included. Length over the buffers 55 cm / 21-5/8.