Lot
548 
(Northwest Territory) "Marietta, 11 Apl.", red manuscript postmark and matching "25" rating on folded letter to Philadelphia, Penn., endorsed "Post" and with letter dateline of "Marietta April 8, 1799"; slight ink erosion in address, a Very Fine example of this rare postmark, unlisted in red by the A.S.C.C. Estimate $500 - 750.
Realized: $375