The Class 73 is a class of diesel locomotives operated by SNCB/NMBS in Belgium.
The class formed the backbone of the NMBS/SNCB shunter fleet. Class 77s have replaced them but they are still to be found across Belgium . They were built in three batches: 7301-7335 during 1965âÂÂ1967, 7336-7375 during 1973-1974 and finally 7373âÂÂ7395 in 1976âÂÂ1977.