For me its the first or very early LP's of: Allman Brothers - "Allman Joys" "Idyllwild South" Santana - "Santana" 200 g reissue Emerson Lake and Palmer - "Emerson Lake and Palmer" and, Beethoven - "Piano Concerto No. 4 in G Major" Rudolph Serkin/Ozawa/BSO
Well, I don't think it is a 1st pressing. It has a solid yellow label instead of a tri-colored label. It sounds better with phase inverted. Maybe, the OP was mono?
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