Vinyls come with 2 kinds of "catalogue" numbers. One starting with the Korean letter ㄱ ("G") followed by numerals, printed on the cover (usually, but not always), and two starting with the Korean letter ㅁ ("M") or ㄷ ("D"), etc, followed by numerals, which actually are the matrix numbers. The numbers starting with ㅁ or ㄷ etc, are always printed on each side's label, and also engraved on the center of the record, after the ㄱ number. Some records bear the same ㄱ number, but with different titles, and different matrix numbers. As those "ㄱ" numbers also appear on books published in the DPRK, we believe they correspond to an "authorization to print" number, or some kind of censorship clearance. That would mean that several different records of the same series benefit of the same clearance number.
The numbers indicated here as "catalogue numbers" are actually the ㄱ numbers, as they are the most obvious (printed on cover and sometimes on center label above the "matrix" number). If the catalogue number of a new record you want to add here already exists, please add also the matrix numbers for each side in order to clarify the difference between the records beyond the song titles list.