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In 1981, the Korean State Railway took delivery of seven Francorail-MTECSE26-21diesel locomotives from France, followed by five more in 1985. Due to oil shortages in the late 1980s and early 1990s, it was decided to develop a new electric locomotive based on these diesels. Like all locomotive development in the DPRK, this work was carried out by the Kim Chong-t'ae Electric Locomotive Works in P'yŏngyang.
Apparently intended as a replacement for the Red Flag 1-class locomotives, these locomotives, of which at least 41 have been built, incorporate components copied from the original French parts. Used for mainline passenger and freight service, they are painted in the standard light blue over dark green livery, or its newer light green/dark green variant.
Named locomotive
There is one known named locomotive:
Commemoration of the 7th Congress of the General Federation of Trade Unions of Korea (조선직업총동맹 제7차대회기념호, Chosonjigopchongdongmaeng che7chadaehoekinyom-ho), numbered 5437, painted in light green over dark green.