Former presidents of the United States are honored on this series of one-dollar coins issued for circulation during the period from 2007 through 2011, and only for numismatic sales thereafter. Four different coins are issued each year, in the order that the presidents served. The reverse of each coin has a design featuring the Statue of Liberty. As with the Sacagawea dollars, some coins have been found that lack the usual edge lettering. The motto IN GOD WE TRUST was moved to the obverse starting in 2009.
A companion series of $10 gold bullion coins honors the spouses of each president during that president’s term of service. These coins are made of 24-karat gold, and on the obverse have an image of the spouse and a theme symbolic of the spouse’s life and work.