Original vintage ink self-portrait of Goldberg busy at work, probably sketching out a blueprint to one of his wacky contraptions, on an off-white 4.5 x 2.75 card, signed and inscribed “To O. Mackey, Rube Goldberg, Dec. 1929.” In fine condition, with light toning to the edges. Pre-certified PSA/DNA and RR Auction COA.
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