Blood & Co., 1850 (1¢) bronze on black. Acid canceled and tied in combination with 1851, 3¢ dull red by "Philadelphia, Pa., Nov 13" cds on cover to Baltimore, Md., clear 1856 Blood's circular date stamp, Very Fine and choice; with 2000 P.F. certificate. Scott No. 15L13  Estimate $250 - 350. $0 (Image)