Postmaster’s Provisional, Baltimore, MD. 1845 5c Black on bluish (3X3)
Position 1, used on May 1st 1846 folded cover to Washington. Regarded by many as the finest of the twenty-six known examples. Ex. Colson, Weill, and John Hill. With Philatelic Foundation certificate(1989), Scott retail $13,500.00
Sold for $35,200 in 1989, $46,750 in 1998.