15c Dark Blue (259). Bottom imprint and plate no. 52 block of six, original gum, center stamps h.r., other four Mint N.H., deep rich color on bright paper, top center stamp small thin spot from partial hinge removal, Fine-Very Fine appearance, a scarce plate block, we have offered only three others since keeping computerized records (one had toned spots and another had perfs into the design), we have never offered one in Mint N.H. condition

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