First-year pressing
I Don't Know / Worry Blues 1952 US Pressing (1531)
- Artist
- Willie Mabon and His Combo
- Title
- I Don't Know / Worry Blues
- Label
- Chess 1531
- Country
- US
- Released
- November 1952
- Format
- 7", 45 RPM, Single
Runout and matrix codes
Etched or stamped in the dead wax between the last track and the label. If yours match, you have this pressing.
- U-4315Side A - label
- U-43I5ⅠA1 E2KW 8790 - 1Side A - runout
- U 4314Side B - label
- U-43I4ⅠA1 E2KW 8791 · 1Side B - runout
Other US pressings of I Don't Know / Worry Blues
- 1952Chess 1531Shellac, 10", 78 RPM, Single
- 1952Chess 15317", 45 RPM
- 1952Parrot 1050Shellac, 10", 78 RPM
- 1952Checker 1050Shellac, 10", 78 RPM
- 1952Chess 15317", 45 RPM, Single
- 1952Chess 1531Shellac, 10", 78 RPM
- 1953Chess 1531Shellac, 10", 78 RPM, Single, Repress
- ?Chess CH 15317", 45 RPM, Single, Reissue
- ?Chess 15317", 45 RPM, Single, Reissue
- ?Chess 1531Shellac, 10", 78 RPM, Repress