In the 1990s, the Korean State Railways obtained some M62s from Russia for parts, as well as attrition replacements, one of which was partially repainted into standard light blue over dark green (keeping the distinctive striping of the original Russian scheme, and even the original Russian number plates on the ends) and was assigned the number 646 - this is a number originally assigned to one of the 64 units delivered new.
Starting in the mid-1990s, the Korean State Railways began buying M62s second-hand from former Communist countries to put into service.

The first such purchase came from Germany, which saw a total of 31 units shipped from the stock of the former East German Deutsche Reichsbahn between 1996 and 1998 - six in 1996, fourteen in 1997 in three shipments, and eleven in 1998 in at least two shipments:
21 December 1996 - 220 048-3, 220 219-0, 220 289-3, 220 292-7, 220 318-0, 220 322-2;
22 April 1997 - 220 043-4, 220 234-9, 220 290-1, 220 335-4, 220-345-3, 220 367-7;
19 November 1997 - 220 371-9, 220 372-7, 220 375-0
20 November 1997 - 220 114-3, 220 211-7, 220 296-8, 220 317-2, 220 332-2
11 March 1998 - 220 008-7, 220 180-4, 220 305-7, 220 319-3
1998 - 220 086-3, 220 087-1, 220 119-2, 220 159-8, 220 334-7, 220 342-0, 220 362-8
In 2000, a total of 13 units were received from the Polish State Railways, shipped in two batches:
8 May 2000 - ST44 103 (w/n 1970/830), ST44 152 (1968/519), ST44 325 (1971/1166), ST44 518 (1976/2497), ST44 649 (1977/????),
ST44 673 (77/2912)
1 October 2000: ST44 72, ST44 549, ST44 840, ST44 929, ST44 937, ST44 947, ST44 999
All of the locomotives in the 700 series have been repainted into overall green with a yellow stripe (arranged the same was as the previous DR livery of burgundy red with a white stripe).

Known to be assigned to P'yŏngyang Depot is 715.

The origins of the following units are known:
내연701 ex-DR
내연705 ex-DR
내연706 ex-DR
내연707 ex-DR
내연719 ex-DR
내연720 ex-DR
내연728 ex-PKP
내연738 ex-PKP
내연742 ex-PKP
내연743 ex-PKP
내연744 ex-ŽSR
In the 1990s, the Korean State Railways obtained some M62s from Russia for parts, as well as attrition replacements, one of which was partially repainted into standard light blue over dark green (keeping the distinctive striping of the original Russian scheme, and even the original Russian number plates on the ends) and was assigned the number 646 - this is a number originally assigned to one of the 64 units delivered new. Starting in the mid-1990s, the Korean State Railways began buying M62s second-hand from former Communist countries to put into service.
The first such purchase came from Germany, which saw a total of 31 units shipped from the stock of the former East German Deutsche Reichsbahn between 1996 and 1998 - six in 1996, fourteen in 1997 in three shipments, and eleven in 1998 in at least two shipments:
21 December 1996 - 220 048-3, 220 219-0, 220 289-3, 220 292-7, 220 318-0, 220 322-2;
22 April 1997 - 220 043-4, 220 234-9, 220 290-1, 220 335-4, 220-345-3, 220 367-7;
19 November 1997 - 220 371-9, 220 372-7, 220 375-0
20 November 1997 - 220 114-3, 220 211-7, 220 296-8, 220 317-2, 220 332-2
11 March 1998 - 220 008-7, 220 180-4, 220 305-7, 220 319-3
1998 - 220 086-3, 220 087-1, 220 119-2, 220 159-8, 220 334-7, 220 342-0, 220 362-8
In 2000, a total of 13 units were received from the Polish State Railways, shipped in two batches:
8 May 2000 - ST44 103 (w/n 1970/830), ST44 152 (1968/519), ST44 325 (1971/1166), ST44 518 (1976/2497), ST44 649 (1977/????), ST44 673 (77/2912)
1 October 2000: ST44 72, ST44 549, ST44 840, ST44 929, ST44 937, ST44 947, ST44 999
All of the locomotives in the 700 series have been repainted into overall green with a yellow stripe (arranged the same was as the previous DR livery of burgundy red with a white stripe).
Known to be assigned to P'yŏngyang Depot is 715.
The origins of the following units are known:
내연701 ex-DR
내연705 ex-DR
내연706 ex-DR
내연707 ex-DR
내연719 ex-DR
내연720 ex-DR
내연728 ex-PKP
내연738 ex-PKP
내연742 ex-PKP
내연743 ex-PKP
내연744 ex-ŽSR
K62-class locomotive