honoring George H. W. Bush and an accompanying First Spouse gold coin for Barbara Bush, which was signed into law by President Donald Trump on January 28, 2020. Collecting Despite not seeing widespread use in circulation, the series has seen a few lower-mintage issues, mostly in specially marketed sets. Reverse Proof issues were made for the coins depicting Harry S. Truman, Dwight D. Eisenhower, John F. Kennedy, Lyndon B. Johnson, Ronald Reagan and George H. W. Bush between 2015 and 2020. These issues had mintages between 16,000 and 48,000, depending on the issue. Coin details Dollar coins were issued bearing the likenesses of presidents, as follows: First Spouse program The United States has honored the spouses of each of the presidents honored by the Presidential $1 Coin Act by issuing half-ounce $10 gold coins featuring their images, in the order they served as first spouse, beginning in 2007. To date, all first spouses have been women (often called first ladies), but the law uses the term first spouse. The obverse of these coins feature portraits of the nation's first spouses, their names, the dates and order of their terms as first spouse, as well as the year of minting or issuance, and the words "In God We Trust" and "Liberty". The United States Mint issued the first spouse gold coins on the same schedule as the Presidential $1 coins issued honoring the presidents. Each coin has a unique reverse design featuring an image emblematic of that spouse's life and work, as well as the words "The United States of America", "E Pluribus Unum", "$10", "1/2 oz.", and ".9999 Fine Gold". When a president served unmarried, as four presidents did, a gold coin was issued bearing an obverse image emblematic of Liberty as depicted on a circulating coin of that era, and bearing a reverse image emblematic of themes of that president. One exception is the coin depicting suffragist Alice Paul which represents the era of the Chester A. Arthur presidency, as Arthur was a widower. The act, as written, explicitly states that the First Spouse coins are to be released at the same time as their respective $1 Presidential coins. Because the act links a first spouse's eligibility for a coin to that of the presidential spouse, it means that a living first spouse could have appeared on a coin; actually this did not happen, though Nancy Reagan died only