U.S. & Worldwide Stamps & Postal History

1857 10k brown & blue, unused with part original gum, rich colors indicating late print of the first issue, intact embossing on back, ample margins all around, except just in at bottom right, still v.f. The stamp was probably adhered on cover and not canceled, with large part of white, original gum (!) preserved, when lifted. A fabulous unused and uncanceled Russia Number One, with significant part original gum, accompanied by 1991 Mikulski certificate ("unused example of this stamp is a world and Russian rarity, only a few known, with part original gum, very nice colors, good embossing of the Eagle"),
Cat. Val. $62,500
Estimate: $25000