Because of the wine red-yellow livery of Luxembourg's railways and their round front, the "nez ronde", the locos were nicknamed doryphores (potato beetles).
The Belgian locos originated as versions of the NSB Di 3 of Swedish manufacturer Nydqvist och Holm (NoHAB), which in turn had a license for the F-units of Electro-Motive Diesel (EMD), a subsidiary of General Motors (GM). The Belgian manufacturer Anglo-Franco-Belge (AFB) received a license from NoHAB, with GM delivered motors (each loco had a 1700 hp prime mover). The main intended use was deployment on passenger trains in the Ardennes. Two of the Luxembourg units, 1602 and 1603, have been preserved.