The 2009 United States Mint Silver Proof Set contains 18 coins, each bearing the S mint mark of the United States Mint at San Francisco. The coins are as follows: (4) Presidential $1 Coins (honoring past Presidents of the United States: William Henry Harrison, John Tyler, James K. Polk and Zachary Taylor); (6) Quarter-dollar coins* (honoring the District of Columbia and the five U.S. territories: Puerto Rico, Guam, American Samoa, the U.S. Virgin Islands and the Northern Mariana Islands); (4) Lincoln Bicentennial One Cent Coins** (recognizing the bicentennial of Abraham Lincoln?s birth); (1) Native American $1 Coin; (1) Jefferson nickel; (1) Roosevelt dime*; (1) Kennedy half-dollar*. *The dime, half-dollar and six quarters are struck in 90% silver, generally referred to as coin silver.**Lincoln Cents contain an alloy consisting of 95% copper, 3% zinc and 2% tin that matches the alloy used in the original 1909 version..

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