2c Black, Die I, II, Plate Proofs on India and Card (73P3-73P3a, 73P4). Collection of 38 proofs including one pair, first 33 are plate proofs in Black on a mix of both India paper and card, India shows both Die I and Die II, card are all Die II, mounted on two clear stock pages which offers insight into the slightly different shades from different printings, ample to large margins, a few typical small flaws including a couple on card with some toning, only one on India paper with a more serious thin, additional five plate proofs are trial colors including two Atlanta proofs, small flaws on the non-Atlanta trial colors, overall Very Fine group

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