Class 749 was created by converting 34 Class 751 Bo-Bo diesels and 26 similar Class 752s to ETH between 1992 and 1996. At the turn of the 21st Century class 749s could be found working passenger services on a number of secondary lines but by the end of the decade most of their work had gone.
A handful of these popular engines have been retained at Praha and regularly work at weekends.