In their classic reference, Encyclopedia of U.S. Gold Coins 1795-1933, Jeff Garrett and Ron Guth call the 1927-D Saint-Gaudens double eagle "a legendary rarity-the rarest regular-issue gold coin of any denomination of the 20th century." Of course, the 1933 double eagle was once even more elusive, before a group of 10 specimens was discovered in 2005. Unfortunately, the U.S. government contends the 1933 was not "regularly issued" and only one of the 13 known specimens is legal to own, making the issue essentially uncollectible. For all intents and purposes, the 1927-D is "truly the king of all 20th-century gold coins", as Garrett and Guth contend. Heritage Auctions is proud to present a spectacular Premium Gem example of this celebrated gold rarity in just its third auction appearance. August 22 - 28 US Coins Signature® Auction