U.S.P.O., Philadelphia Pa., 1c Black on Rose (7LB6).
Large bottom margin, trace of right frameline, tied by blue "Philada. Pa. Jan. 25/5" integral-rate circular datestamp on blue 1850 folded letter to Norristown Pa., fresh and Fine, only 10 covers reported with the No Initials stamp on Rose paper, two or three are tied by the postmark, ex Gibson
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