The U.S. Mint's Presidential Dollar series, which debuted in 2007, honors our nation's presidents in the order they served as heads-of-state. This 2013 set features tributes to William McKinley, Theodore Roosevelt, William Taft and Woodrow Wilson. Edge-incused lettering displays the year of issuance, E Pluribus Unum and the mintmark. The motto In God We Trust appears on the obverse. A handsome Statue of Liberty engraving adorns the reverse. Each golden colored proof dollar coin features frosted engravings and dazzling mirror backgrounds.