USA - four blocks of four stamps, essays for the 1877, 3 cen...
USA - four blocks of four stamps, essays for the 1877, 3 cent stamp by Philadelphia Bank Note Co, Scott Catalogue #184-E5. Essays in 4 different trial colour proofs, red-violet, Carmine, dark green and orange. Mint without gum and imperforate. The upper left corner of red-violet block is almost cut through. (4)
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USA - four blocks of four stamps, essays for the 1877, 3 cent stamp by Philadelphia Bank Note Co, Scott Catalogue #184-E5. Essays in 4 different trial colour proofs, red-violet, Carmine, dark green and orange. Mint without gum and imperforate. The upper left corner of red-violet block is almost cut through. (4)
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