Waggon & Maschinenbau Railbus. E79963 was one of five delivered to BR in 1958. At one time all could be found allocated to 31A Cambridge. The model is fitted with a loksound V4 with sound from Olivia's trains. Power is provided by an MRC 5 pole open frame X04 type motor mounted in a modified Triang 00 gauge chassis, driving on one set of wheels. To ensure smooth running a bank of capacitors is hidden under the chassis.