A 1927-D double eagle $20 will feature in Heritage Auctions' March 20 sale in San Francisco with an opening bid of $850,000.
Of the 12-13 surviving examples produced in 1927, only seven are in circulation on the market - making this the rarest regular issue US coin of any type.
 The 1927-D double eagle $20 is the rarest US regular issue coin in existence |
The example offered in the sale is graded MS63, the lowest graded specimen of the seven, and was last sold at Stack's Bowers in 1988 for $220,000.
The record for the series was set in 2005 for an MS67 graded specimen, the finest known, which hammered for $1.8m at Heritage in 2005.
Bidding on an 1870-CC double eagle will open at $300,000.
The issue originates in Carson City and was produced in an issue of 3,789 - of which around 50 are thought to have survived to the present day.
They were minted around 10 years after the discovery of the Comstock Lode, a huge deposit of precious metal hidden underground on the outskirts of the city.
One example sold for $329,000 at Heritage Auctions in January of this year.
We have a range of rare coins available.
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