Prototype: Atchison, Topeka & Santa Fe Railway (AT & SF) EMD F7 diesel-electric locomotive. B unit.
Model: Non-powered B unit as an add-on to the powered 54307 locomotive. The unit has Märklin claw couplers at both ends. It has a different road number from that used for 54307. Minimum radius for operation 600 mm / 23-5/8". Length 47.5 cm / 18-11/16".