In August 2005, the United States Mint announced the recovery of ten additional stolen 1933 double eagle gold coins from the family of Philadelphia jeweler Israel Switt, the illicit coin dealer identified by the Secret Service as a party to the theft who admitted selling the first nine double eagles recovered a half-century earlier. In September 2004, the coins' ostensible owner, Joan Switt Langbord, voluntarily surrendered the 10 coins to the Secret Service. In July 2005, the coins were authenticated by the United States Mint after working with the Smithsonian Institution, as being genuine 1933 double eagles.