Joan Baez in Concert, V1 and V2
And on a completely different note, the first full length stereo recording still extant:
Beethoven’s 5th piano concerto, The Emperor, performed in Berlin during an air raid, by Gieseking and conducted by Artur Rother, or Varese Sarband.
An historical note: I understand that the Telefunken tape recorder was ’liberated’ and shipped to the USA for reverse engineering, which formed the backbone of the modern recording industry. But I could be wrong.