Postage Stamps
Spink Shreves Civil War sale offers Groten collection of Union Patriotic Labels
Commemorating the attack on Fort Sumpter, the auction also includes banknotes, autographs and coins
Spink Shreves offers the $500,000 'Black Empress of Canada' for sale
It is regarded as the finest mint example of a classic rarity: the 1851 12d black Canadian stamp