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Tracklist Hide Credits

A	I Don't Know Written-By – W. Mabon*
B	Worry Blues Written-By – W. Mabon*

Companies, etc.

• Record Company – Chess Record Corp.
• Manufactured By – Chess Record Corp.
• Published By – Burton Ltd.

Credits

• Vocals – Willie Mabon

Notes

Recorded in Chicago at Universal Recording - c. October 1952.

First press [with publisher & rights society printed on label]. Dual-status item, based on a deal of Al Benson with the Chess brothers. Shortly before released on Parrot . The Parrot versions saw little circulation outside of Chicago.

Barcode and Other Identifiers

• Matrix / Runout (Side A - label): U-4315
• Matrix / Runout (Side A - runout): U-43I5ⅠA1 E2KW 8790 - 1
• Matrix / Runout (Side B - label): U 4314
• Matrix / Runout (Side B - runout): U-43I4ⅠA1 E2KW 8791 · 1
• Rights Society (Side B): B.M.I.

Other versions

Category	Artist	Title (Format)	Label	Category	Country	Year
1531	Willie Mabon And His Combo	I Don't Know / Worry Blues ‎(7", Single)	Chess	1531	US	1953
1531	Willie Mabon And His Combo	I Don't Know / Worry Blues ‎(Shellac, 10", RP)	Chess	1531	US	Unknown
1531	Willie Mabon And His Combo	I Don't Know / Worry Blues ‎(Shellac, 10", Single)	Chess	1531	US	1952
1050	Willie Mabon And His Combo	Worry Blues / I Don't Know ‎(Shellac, 10")	Parrot	1050	US	1952
1531	Willie Mabon	I Don't Know / Worry Blues ‎(7", Single, RE)	Chess	1531	US	Unknown