These items are from one side of a poor quality 12" 33-1/3 rpm acetate. The Davis sextet headlined a "Dimensions in Jazz" concert with the Art Farmer-Benny Golson Jazztet, Nina Simone, and others. According to Chris De Vito the set consisted of "So What," "Walkin'," "On Green Dolphin Street," and "'Round Midnight."

Buddy Montgomery was booked to perform with Davis on the "Jazz at the Philharmonic" tour of Europe -- he is included in the programs for several venues -- but he cried off at the last minute because of a fear of flying. The Quintet performed without him, and this is the only extant recording of the expanded group.