U.S.P.O., Philadelphia Pa., 1c Black on Vermilion Glazed (7LB8).
Large top margin, trace of frameline at right, slightly creased at corner, uncancelled, used on 1850 folded letter to Cross Roads Pa., partly readable strike of blue "Philada. Pa. 5 cts. Feb. 11" integral-rate circular datestamp, a bit toned and spotted, small edge tear, otherwise Fine, very scarce (14 reported covers), ex Green, Gibson and Golden, with 2003 P.F. certificate
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