K.B. Nuremberg Karl Bub Clockwork Railway Track S U.S. Zone Germany Complete with rails, locomotive and 2 carriages and keys In original packaging. Made in U.S. Zone Germany Karl Bub Nuremberg Locomotive made of tin. Track S Condition: Functionality: good. With a key, the locomotive’s flywheel is set in motion, and it starts to move. As with all old locomotives, the movement is getting older. The locomotive alone runs about 3 laps on the tracks. With a carriage it runs two laps. With two carriages, the locomotive is too heavy. So no defect, everything is due to age.