In the early 1970s a number of 'Materieel 1954' (Hondekop) multiple units were in need of a major overhaul. From 1971 to 1973 they were converted into the new InterCity trains. The series 761 - 786 were renumbered in the series 780 - 791. The first converted Hondekop was number 790 in January 1972. The InterCity trains can be recognized by the blue band around the windows on the new yellow NS livery. From 1976 the InterCity Hondekop trains were renumbered again with a 1 in front of the number. During the overhaul in 1979 the gray doors were painted yellow and the blue band was extended over the doors.