 After World War I only U.1, U.34 and U.41 remained in Jindřichův Hradec and in 1924 when ČSD took over the railway they were reclassified as U 37 and renumbered U 37.001, U 37.005 and U 37.006.ČSD bought three class U 47 Mallet locomotives and rented a further two identical locomotives for use on the lines.A U 37 and a U 47 are used on the railway today for tourist trains.