Offering this 2006 United States Mint American Legacy Collection. The proof coins were struck at the San Francisco Mint and Philadelphia Mints and include the following. 2006 Benjamin Franklin Tercentenary Commemorative Silver Dollar, composed of 90% Silver (Philadelphia Mint). 2006 Old Mint “The Granite Lady” San Francisco Mint 100th Anniversary Commemorative Silver Dollar with a lightly/beautifully toned reverse (See photos). 2006-S Dime, Nickel and Cent. 2006-S State Quarters:(Copper-Nickel Clad).