U.S.P.O., Philadelphia Pa., 1c Black on Rose (7LB6).
Full frameline at left, other margins showing parts of framelines, tied by blue "Philada. Pa. May 14/5" integral-rate circular datestamp on blue 1849 folded letter to New York, Very Fine, the No Initials stamp no Rose paper is very scarce on cover (10 reported) and extremely rare with the stamp tied by the postmark, ex Caspary, Judd, with 1992 P.F. certificate
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