1851, 12¢ black, diagonal bisect. Upper right portion of stamp with full top margin, position 5R1 showing an unlisted rosette transfer in margin, tied by San Francisco, Cal. cds on cover to Boston, Mass., manuscript "per Steamship "Oregon" Sept 1st, 1853" endorsement at lower left; cover refolded and the repaired tear in backflap, Very Fine, a lovely and rare bisect usage from San Francisco; with 2007 P.F. certificate. Scott No. 17a  Estimate $1,000 - 1,500. $0 (Image)