The 2007 United States Mint Proof Set includes 14 coins, each bearing the "S" mint mark of the United States Mint at San Francisco. It contains four Presidential $1 Coins honoring the past Presidents of the United States:
- Washington
- Adams
- Jefferson
- Madison
It also contains all five quarters from the 50 State Quarters Program for the year 2007:
- Montana
- Washington
- Idaho
- Wyoming
- Utah
Last, but not least it contains:
- tbe Lincoln cent
- the Jefferson nickel
- the Roosevelt dime
- the Kennedy half-dollar
- the Golden Dollar featuring Sacagawea
United States proof coins are extraordinarily brilliant, with sharp relief and a mirror-like background. Their frosted, sculpted foregrounds give them a special cameo effect. Proof blanks are specially treated, polished and cleaned to ensure high quality strikes. The blanks are then fed into presses fitted with hand-polished dies and struck at least twice to ensure sharp relief. The coins are then packaged in presentation cases to showcase and maintain their exceptional finish.
