US Mint First Spouse Gold Coins Program. The program is the first to feature women in a consecutive series of legal tender coins. The series of gold coins is authorized through the Presidential $1 Coin Act of 2005, which was signed into law (Public Law 109-145) on Dec. 22, 2005 by President George Bush. It calls for the following coin specifications:
A $10 denomination
The same diameter as the $1 coins
0.5 ounces in weight
.9999 fine pure gold (24 karat)
And issued as counterparts and during the same period as the circulating Presidential $1 Coins
There are two cases where a President has had more than one wife during service and two coins are issued, like John Tyler. Tyler’s first wife Letitia died during his second year in office. Tyler later married Julia while still President. Under the program, the US Mint issued both Letitia and Julia First Spouse Coins.