10 Dollars Caroline Harrison, Bullion Coinage

Caroline Harrison is an unusual choice for this series — she died in the White House in October 1892, two weeks before her husband lost his re-election bid to Grover Cleveland, and spent her final months bedridden while Benjamin Harrison campaigned largely alone. The First Spouse bullion program, authorized under the Presidential $1 Coin Act of 2005, required a corresponding gold issue for every presidential dollar, which meant spouses who predeceased their husbands or served in unusual circumstances received coins regardless of historical prominence.

Mintage for the 2012 Caroline Harrison bullion issue was just 2,798 pieces — among the lowest in the entire First Spouse series.