

United States
20 Dollars "Metric Double Eagle / Quintuple Stella" · “Metric Double Eagle / Quintuple Stella”
United States · Gold
The coin
The story
The Quintuple Stella: America's $20 Bid for a World Currency
In 1879 the United States Mint pressed a $20 gold coin that printed its own recipe on its face — 30 grams gold, 1.5 silver, 3.5 copper, 35 grams in all. It was an experiment in a world currency. Five were struck in gold. Today one of them sold for nearly two million dollars.
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