This coin is a 2006 San Francisco Mint State and Territorial Quarter, specifically struck in the 25¢ denomination, which is commonly referred to as a quarter. It is part of the U.S. Mint's program to celebrate the states and territories, featuring a design that represents the culture or history of a specific state or territory. This particular coin was produced as a proof coin, which means it was struck with polished dies and specially treated surfaces to achieve a mirror-like finish, appealing to collectors for its aesthetic qualities. The coin is made from a composition of copper-nickel clad copper, resulting in a weight of 5.67 grams and a diameter of 24.3 millimeters. With a total mintage of 2,882,428 pieces, this quarter is fairly common within the proof coin category but retains collector interest due to its status as part of the State & Territorial Quarters series. The mint mark 'S' identifies it as having been produced at the San Francisco Mint, known for its high-quality coin production. In summary, this 2006 Proof State & Territorial Quarter is a beautifully crafted piece of U.S. numismatic history, embodying both the artistry of coin design and the unique heritage of the American states and territories.
| Country | United States of America |
| Year | 2006 |
| Serie | State & Territorial Quarters |
| Denomination | 25¢ (Twenty Five Cents, Quarter) |
| Mint | San Francisco |
| currency | USD |
| currency-amount | 0.25 |
| diameter | 24.3 |
| height | 0 |
| material | Copper-Nickel clad Copper |
| mint-mark | S |
| mintage | 2882428 |
| type | Coins |
| weight | 5.67 |
| width | 0 |
| year-display | 2006 |