For reasons unknown, two of the 13 M62s bought from Poland, the nine bought from Slovakia and those bought from Russia - new or second-hand - are grouped together in the 내연800 series.
The lowest number seen thus far is 내연855.
The reason for the seeming gap is not known, but it is possible that the many units obtained from Russia for use as parts stores were given numbers in the lower end of the range for inventory purposes.

A total of nine units were received from the Slovak Republic Railways in 2000, delivered in two batches:
8 May 2000: 781 826 (ex 781 317; w/n 1971/1191), 781 827 (ex 781 281; 1970/905), 781 828 (ex 781 373; 1971/1247)
1 October 2000: 3 unidentified units.

Their new numbers are not known, but the dark red livery still carried by some of these machines give their origins away.

Nineteen of the units delivered from Russia are known to have entered operational use.
These are likewise numbered in the 8xx series, grouped together indiscriminately with the machines bought from Slovakia and Poland.

Of these, fifteen were delivered second-hand in 1989, all from the Lvov Division of the Soviet Railways, all M62S type; M62S is the designation for those locomotives originally built for the Soviet Railways of the original M62 design.
These are:
July 1989: M62-1005 (w/n 0933, 1970), M62-1008 (w/n 0936, 1970), M62-1011 (wn 0939, 1970), M62-1077 (w/n 1030, 1970);
August 1989: M62-1101 (w/n 1054, 1970), M62-1102 (w/n 1055, 1970);
September 1989: M62-1187 (w/n 1301, 1971), M62-1189 (w/n 1303, 1971), M62-1191 (w/n 1308, 1971), M62-1195 (w/n 1312, 1971), M62-1246 (w/n 1363, 1971), M62-1262 (w/n 1381, 1971), M62-1288 (w/n 1586, 1972);
October 1989: M62-1083 (w/n 1036, 1970), M62-1085 (w/n 1038, 1970).

At least three of the ex-Russian locomotives that have entered service, 862, 863 and 870, are of the DM62 type.
The DM62 was a variant of that, originally delivered to the Soviet Army between 1982 and 1994.
These were operated by the 10th, 52nd and 36th Guards Missile Divisions of the Soviet Army to pull the combat missile trains in which RT-23UTTKh rail-mobile ICBMs were carried.
The DM62 differs from the standard M62S by a number of changes designed to improve the reliability and survivability of the locomotive; some of these changes were later incorporated into the design of the (2)M62U. External spotting differences include the bogies, the rectangular housings for the headlights, and the box between the headlight on which the number plates are mounted.
Other differences include heat sensors in the journal boxes, automatic starters for the engine, blackout shields, and multiple-unit operation regardless of the locomotives position in the train.
Following the dissolution of the Railway Rocket Troops in 2000, these locomotives were transferred to the Russian Railways.

In addition to the units received second hand, two M62UP - single-section versions of the Russian 2M62U twin-section locomotives - were built new for the Korean State Railway in 1990; these were given the factory designation KM62U. Externally, these differ from standard M62s in their headlights, which are mounted in the same rectangular housings as on the DM62 and other minor details.
They are powered by a water-cooled Kolomna 14D40U2 two-stroke diesel engine and have a GP-312U2 generator.

The origins of the following units are known:
내연818 ex-PKP
내연853 ex-ŽSR; red/yellow
내연855 ex-PKP
내연859 ex-ŽSR
내연862 ex-RZhD DM62
내연863 ex-RZhD DM62
내연866 ex-PKP
내연868 ex-ŽSR
내연870 ex-RZhD DM62
내연873 ex-RZhD M62U
For reasons unknown, two of the 13 M62s bought from Poland, the nine bought from Slovakia and those bought from Russia - new or second-hand - are grouped together in the 내연800 series. The lowest number seen thus far is 내연855. The reason for the seeming gap is not known, but it is possible that the many units obtained from Russia for use as parts stores were given numbers in the lower end of the range for inventory purposes.
A total of nine units were received from the Slovak Republic Railways in 2000, delivered in two batches:
8 May 2000: 781 826 (ex 781 317; w/n 1971/1191), 781 827 (ex 781 281; 1970/905), 781 828 (ex 781 373; 1971/1247)
1 October 2000: 3 unidentified units.
Their new numbers are not known, but the dark red livery still carried by some of these machines give their origins away.
Nineteen of the units delivered from Russia are known to have entered operational use. These are likewise numbered in the 8xx series, grouped together indiscriminately with the machines bought from Slovakia and Poland.
Of these, fifteen were delivered second-hand in 1989, all from the Lvov Division of the Soviet Railways, all M62S type; M62S is the designation for those locomotives originally built for the Soviet Railways of the original M62 design. These are:
July 1989: M62-1005 (w/n 0933, 1970), M62-1008 (w/n 0936, 1970), M62-1011 (wn 0939, 1970), M62-1077 (w/n 1030, 1970);
August 1989: M62-1101 (w/n 1054, 1970), M62-1102 (w/n 1055, 1970);
September 1989: M62-1187 (w/n 1301, 1971), M62-1189 (w/n 1303, 1971), M62-1191 (w/n 1308, 1971), M62-1195 (w/n 1312, 1971), M62-1246 (w/n 1363, 1971), M62-1262 (w/n 1381, 1971), M62-1288 (w/n 1586, 1972);
October 1989: M62-1083 (w/n 1036, 1970), M62-1085 (w/n 1038, 1970).
At least three of the ex-Russian locomotives that have entered service, 862, 863 and 870, are of the DM62 type. The DM62 was a variant of that, originally delivered to the Soviet Army between 1982 and 1994. These were operated by the 10th, 52nd and 36th Guards Missile Divisions of the Soviet Army to pull the combat missile trains in which RT-23UTTKh rail-mobile ICBMs were carried. The DM62 differs from the standard M62S by a number of changes designed to improve the reliability and survivability of the locomotive; some of these changes were later incorporated into the design of the (2)M62U. External spotting differences include the bogies, the rectangular housings for the headlights, and the box between the headlight on which the number plates are mounted. Other differences include heat sensors in the journal boxes, automatic starters for the engine, blackout shields, and multiple-unit operation regardless of the locomotives position in the train. Following the dissolution of the Railway Rocket Troops in 2000, these locomotives were transferred to the Russian Railways.
In addition to the units received second hand, two M62UP - single-section versions of the Russian 2M62U twin-section locomotives - were built new for the Korean State Railway in 1990; these were given the factory designation KM62U. Externally, these differ from standard M62s in their headlights, which are mounted in the same rectangular housings as on the DM62 and other minor details. They are powered by a water-cooled Kolomna 14D40U2 two-stroke diesel engine and have a GP-312U2 generator.
The origins of the following units are known:
내연818 ex-PKP
내연853 ex-ŽSR; red/yellow
내연855 ex-PKP
내연859 ex-ŽSR
내연862 ex-RZhD DM62
내연863 ex-RZhD DM62
내연866 ex-PKP
내연868 ex-ŽSR
내연870 ex-RZhD DM62
내연873 ex-RZhD M62U
K62-class locomotive