Scarce original pair of Columbia Recording Corporation 12″ inch test pressings, one marked "Pt 1, Mikrokosmos, Bartok" and the other "Pt IV, Mikrokosmos, Bartok," both signed on their respective label in blue or black ink, "Accepted Bartok." Framed to an overall size of 16.75 x 30.75. In very good to fine condition, with some paper loss to each label.
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