Lot 28Philadelphia, Pa., U.S.P.O. Despatch, 1850-52, 1¢ blue, clear to large margins, on folded letter sheet to Philadelphia, with red "Kensington, Pa. Sep 6" origin cds and matching "5" rate handstamp obliterated be grid handstamp; some erasure of name in address panel, otherwise Very Fine, an extremely rare carrier usage between Kensington and neighboring Philadelphia, ex-Knapp & Meyersburg; with 1997 P.F. certificate.
Scott No. 7LB12 Estimate $300 - 400.