2015-s US Marshals Modern Commem Half Dollar 50c Graded GEM++ Proof Deep Cameo By USCG. The U.S. Mint released the U.S. Marshals 225th Anniversary $1 Silver Coin in 2015 as part of the U.S. Marshals 225th Anniversary Commemorative Coin Program. It commemorates the U.S. Marshals Service, the nation’s oldest federal law enforcement agency. The program includes a $5 gold coin, $1 silver coin, and half dollar clad coin with unique obverse and reverse designs.