Medical scientist (1899–1978) who co-discovered insulin in 1921. Glossy 5 x 8 half-length photo of Best at his desk, signed and inscribed in the lower border in blue ballpoint, “For Harry Nadley, Charles H. Best.” In fine condition, with scattered light creases and some skipping to his surname. Accompanied by the original mailing envelope. Pre-certified PSA/DNA.
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