The set includes all five State Quarters issued in 2003 in proof condition:
- Illinois - Land of Lincoln
- Alabama- Spirit of Courage
- Maine - Pemaquid Point Light
- Missouri - Corps of Discovery
- Arkansas - Natural Resources
United States proof coins are extraordinarily brilliant with a sharp relief and a mirror-like background. Their frosted, sculpted foreground gives them a special "cameo" effect, created by the proofing process.
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 a sharp, high relief. The coins are then packaged in presentation cases to showcase and maintain their exceptional finish.