Overview for Collectors


The following basic list outlines the overall structure of the M, X and OP Masterworks series.

M-1 to M-770

All Masterworks sets released in ‘M’ and ‘MM’ formats as well as some, sporadic ‘AM’ releases for throw-off type record changers.

Automatic (‘AM’ Series)

M-177 to M-418

All sets between 177 and 418 were released in the ‘AM’ format except for the following exceptions:

M-771 to End of M Series

All Masterworks sets from 771 were released in the ‘MM’ format only with the following exceptions (which also feature manual releases): 780, 789, 790, 791, 792, 798, and 802.

Vinylite Series

78-rpm Vinyl Sets – All released in ‘MV’ (Manual) and MMV (Drop automatic)

727; 734; 735; 741 (No ‘MV’ version); 744; 986

One-Sided Recordings

M-600 and 735

Oddities

The following list features 78rpm releases in the Masterwork series which either have different set numbers/prefixes or record number variations:

M-738 (Record numbers with ‘LL’ prefixes)

M-739 (Record numbers with ‘LL’ prefixes)

M-789 (Record numbers with ‘ME’ prefixes)

M-790 (Record numbers with ‘ME’ prefixes)

M-791 (Record numbers with ‘ME’ prefixes)

M-792 (Record numbers with ‘ME’ prefixes)

Non-Released Sets (Not issued)

M-62; 476; 594; 636; 678; 731; 737; 782 to 783; 805; 817; 923; 976 to 977; 993 to 997; 1004; 1009 to 1010.

X-192; 275

Sets that have no record numbers assigned

M-976; 977; 993; 994; 995; 996; 997 and A-1010

Sets assigned record numbers but never issued

MX-192; MX-275

Missing Sets (Not issued or recorded)

M-636; 678; 731; 737; 782; 783; 805; 817; 923; 993

Record Sizes

All Masterworks M recordings were released in 12 inch format except for the following list of 10 inch recordings:

M-90; 94; 198; 231 to 234 inclusive; 268; 298; 306; 329; 347; 361; 375; 382; 393 to 394; 396; 408; 419; 422; 424; 430; 434 to 435; 440; 482; 494; 499; 501 to 502; 505; 507 to 508; 513; 518; 522; 534; 539; 555; 559; 571; 582; 587; 593; 595; 635; 644; 647; 660; 663; 684; 692; 694; 722; 743; 746; 750; 752; 762 to 764; 809; 812; 818; 845; 850; 860; 907; 992; 999; 1000; 1075; 1100.

X-112; 149 to 150; 158 to 159; 168; 171; 174; 179; 191; 194; 209; 227; 233; 260; 270 to 272; 318; 340.

The following sets contained a mixture of both 12 and 10 inch records in a variety of combinations:

199; 253; 289; 314 to 315; 317; 453; 486.

All recordings released on the Royal Blue label expect for

M-463

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