1c-50c Brown, 1879 Postage Due, Hybrid Composite "H" Proof (J1P3-J7P3 var.). The seven values on India paper cut close and pressed on die sunk 78 x 91mm card, Very Fine, this is the so-called "H" proof because of the manner in which the proofs are arranged on the card and the proofs used to make this presentation item are the only ones available that are brown (like the four lower values) as opposed to the dark brown India plate proofs of the 10c-50c from full sheets, with 1968 Essay-Proof Journal article by Warren R. Bower

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