The 2007 S Presidential Dollar Proof Set includes four coins featuring the portraits of George Washington, John Adams, Thomas Jefferson, and James Madison. Minted in San Francisco by the United States Mint, these proof coins are made of manganese-brass with a fineness of 0.9. The set comes in its original box with a Certificate of Authenticity, making it a valuable addition to any coin collection focusing on US presidential dollars. Each coin is uncirculated and in pristine proof condition, showcasing the detailed craftsmanship and historical significance of these coins.