Polskie Nagrania Muza

Polish state-owned label in the People's Republic times, still active these days (releasing mostly the old, remastered recordings, classical music, operas, etc.). Currently the brand is owned by Polish branch of Warner Music. [b][i]Some useful information which could be helpful when establishing the year of release of LPs (up to year 1991) or at least the years range:[/i][/b] [b]Prefix[/b] SP - 7'' / 45 rpm mono single play SS - same line as above, but in stereo (from mid 70's) N - 7''