U.S.P.O. PAID, 7LB8, 1c Black on Vermilion, Large Top Margin and Trace of Frameline on 1850 Folded Letter

Included in the The First Philadelphia Typeset Carrier Adhesive Stamps 7LB1 to 7LB9 Census By Larry Lyons
1850 folded letter addressed to Cross Roads, Pennsylvania, with blue P "Philada. Pa. 5 cts. Feb. 11" integral-rate circular datestamp. The stamp showing diagonal creases at bottom left; the letter has toning, creases, and a small edge tear. Otherwise fine.