||1856-S $20 -- Improperly Cleaned -- NGC Details. AU. When the San Francisco Mint opened in 1854, it became the chief coining facility for bullion mined from the California gold fields, as reflected in the gradually increasing annual double eagle mintages of its first few years of operation. In 1856, double eagle production amounted to nearly 1.2 million coins, a number that would not be surpassed until 1861 in Philadelphia. The 1856-S, partly because of its availability following the S.S. Central America find and partly because of its connection with Gold Rush era California, is a highly popular issue among double eagle type collectors. This piece was lightly cleaned in the past, but has since acquired pale green-gold patina and retains small remnants of luster in the protected recesses. A few minor abrasions accompany the grade. Ex: Eric P. Newman Numismatic Education Society.
Realized $2126.75. Description courtesy of Heritage Auctions.