Browse our collection of United States Proof Sets. The U.S. mint produces proof sets every year. Each United States Proof Set contains a $1 coins, a half dollar coin, a quarter, a dime, a nickle and a penny. All our proof sets come in original government packaging with outer boxes. The U.S. mint began producing proof sets in 1936 and still produces them to this day. Proof sets have always been a very popular item to coin collectors as each coin is sealed in plastic to preserve the coins. If you do not see the year you are searching for please give us a call at 713-521-1748 and we will see if we have the set in stock or if we can locate one for you.