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Signed book: Source Code: My Beginnings. Collector's edition. Norwalk, CT: Easton Press, 2025. Leatherbound hardcover, 6.5 x 9.75, 318 pages. Signed on the colophon in blue felt tip by Bill Gates. In very fine condition. Accompanied by a full letter of authenticity and grading from PSA/DNA, evaluating the autograph as a "10."
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