The First Spouse coins from the U.S. Mint have a face value of $10 and contain 1/2 oz of pure 24 karat gold, making the metal value alone worth quite a bit on the bullion market. Since very few of the coins have been certified in perfect MS70 condition by NGC, demand has been rising and they could prove to be the type of "sleeper coins" that expert investors seek out.
Helen Taft was the wife of President William Howard Taft and the first lady of the United States from 1909 to 1913. Mrs. Taft key instrumental in social causes such as workplace safety and women’s suffrage. Mrs. Taft was known for helping of the planting of Washington's famous cherry trees.