Diesel locomotive 749 257 belonging to the Czechoslovak State Railways.Design of the third construction series featuring corrugated side walls up to the edge of the roofLivery in attractive Šumperker colour schemeThe diesel locomotive 749 257 was converted from the original class T 478.2 (from 1988: 752). It originates from the delivery series of 82 engines without train heating facilities for goods train operation. In the 1990s, the locomotive was retrofitted with electric heating and renamed the class 749. This modification was prompted by the more economic utilisation of the Bardotkas in front of short trains. The locomotive was also given the attractive Šumperker colour scheme, which was applied to multiple locomotives in different colour combinations. This locomotive was used both for passenger and for goods trains in Czechoslovakia.