Wines, 1951, 1-7/10¢ Green & Black, unused, without gum as issued, bright fresh color on crisp paper, Very Fine, ex-Smithsonian National Postal Museum; with 2005 P.F. certificate. Scott No. RE182F  $22,500. ONE OF ONLY FOUR RECORDED EXAMPLES OF THE 1-7/10¢ 1951 REVENUE STAMP IN PRIVATE HANDS, THE KEY WINE STAMP RARITY. This is from the Smithsonian National Postal Museum deaccession, which is the only source of the 3 known unused copies. There is one used example known. $0 (Image)