The 2007 Presidential Dollar Proof Set is a collection of four U.S. coins, each featuring a proof-quality finish and struck at the San Francisco Mint. The set includes the first four coins in the Presidential $1 Coin series, honoring U.S. presidents George Washington, John Adams, Thomas Jefferson, and James Madison. Each coin features a unique design with the president's portrait on the obverse and a notable inscription on the reverse. The coins are struck with a mirror-like finish, making this set a highly sought-after addition for collectors of American coinage.