U.S.P.O., Philadelphia Pa., 1c Black on Blue Glazed (7LB7).
Margins with three full framelines, uncancelled, used with 5c Red Brown (1),
large margins to just in at bottom, 5c tied by blue grid, matching "Philada. Pa. 5 cts. Feb. 19" (ca. 1850) integral-rate circular datestamp on brown cover to Northumberland Pa., cover age toned and worn but not affecting adhesives, Fine and very rare usage, only three 7LB7 and 1847 Issue combination covers reported in Lyons census
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