Super-detailling, -livery and -lettering. Inset windows. Interior details in drivers cab. Prototypical "daylight" be-tween boiler and chassis. Operational Heusinger valve gear. Brake shoes between the wheels. Cast metal chassis and tender body. Drive in tender on 4 wheels, of which 2 are fitted with traction tyres. Switchable on/off double directional headlights at each end, on tender coordinated with direction of travle. Close-coupling loco/tender. Automatic couplings at each end. Fitted with DCC decoder.
Used for typical passenger trains in the 1950s. The prototype was numbered 23 105 and had a maximum speed of 85km/h. It was the last steam loco taken into DB service in December 1959.