Prototype: Unimat design ballast tamping machine painted and lettered for Plasser & Theurer Construction Machines, Inc. Used for maintaining track, either laying new track or relaying existing track. The unit looks as it did in 2020.

Model: This is a purely digital model with an mfx digital decoder and extensive sound functions. The model is constructed mostly of metal. 4 axles powered using two synchronized motors. The tamping unit can be move vertically and horizontally. It can be controlled individually or in a completely synchronized work mode. The triple headlights and dual red marker lights change over with the direction of travel and can be controlled digitally. The headlights at Locomotive Ends 2 and 1 can be turned off separately in digital operation. The model has the double "A" light function. The long-distance headlights, brake lights, and blinking roof lights can be controlled. Maintenance-free warm white and red LEDs are used for the lighting. The cab has interior details and controllable interior lighting. It can be switched prototypically to blue or white lighting. The work cabin lighting can be controlled. The pantograph can be raised and lowered digitally. The automatically changes from diesel to electric running sounds when the pantograph is raised. Length over the buffers 39.3 cm / 15-1/2".