did purchase EMD Dash 2 electronics had the -2 suffix applied to the end of the locomotive's model designation. The GT26CW-2 made its debut in 1972, but by the mid-1980s, two new designations were added based on mechanical/electrical improvements after the -2 suffix: Type A and Type B. Production spanned from September 1972 to (Unknown) 2006. GT26HCW-2 To provide high horsepower in the passenger service, EMD installed Vapor Clarkson boilers for Head End Power on the GT26 series. Customers who purchased locomotives with Head End Power had the H suffix applied after the GT26 designation. Designated GT26HCW-2, this model was only purchased by Algeria's National Railway. Production spanned from December 1989 to October 1994. GT26MC One of the earliest South African Narrow Gauge export customers for the GT26 Series, the South African Railways purchased custom built GT26MC locomotives that were equipped with lightweight frames shorter than standard a GT26 frame by as well as a six axle (C) interlinked trucks. The locomotives received the M suffix which identifies the lightweight frame as well as Universal type traction motors for rail operation; thus Metric would be the understood term. Production spanned from August 1971 to August 1982. GT26CU-2 The EMD GT26CU-2 first appeared in 1976. Unlike its turbocharged predecessor the GT16, the GT26CU-2 was identified with a U suffix which indicated that this model had traction motors that could fit the locomotive's axles from Metre gauge to Irish gauge rails; thus Universal would be the understood term for the traction motors. Production spanned from May 1976 to August 1992. GT26CU-MP In 1990, the GT26 Series made an unusual departure with the use of microprocessor equipped technology. Customers who purchased locomotives equipped with microprocessors were identified by a -MP suffix added after the model designation. Only the Estrada de Ferro Vitória a Minas was the sole purchaser of the GT26CU-MP locomotive model for use on its Narrow Gauge (U) rail lines. These locomotives are easily identified due to their full-length fuel tank, disappearance of the battery box cabinet, and a rectangular windshield on the engineer's side of the cab. Internally, the locomotive's standard control stand was now replaced with a short desktop control stand. Production spanned from August 1990 to September 1991. GT36CU-MP With the introduction of the 16-645F3B engine for export use, the 26 Series was now identified as the 36 Series, by adding a Further 10 to the predecessor model.