Tập tin:2006 Quarter Proof.pngDescription2006 Quarter Proof.png Removed background, cropped, and converted to PNG with Macromedia Fireworks. Date 6 April 2006 Source United States Mint
Tập tin:2007 UT Proof.pngDescription2007 UT Proof.png English: On May 10, 2006, on the anniversary of the driving of the spike, Utah announced that its state quarter design would be
Tập tin:2006 ND Proof.pngDescription2006 ND Proof.png English: North Dakota state quarter. Removed background and converted to PNG with Kaleido. Date 28 August 2006 Source https://www
Tập tin:2006 NV Proof.pngDescription2006 NV Proof.png Removed background, cropped, and converted to PNG with Macromedia Fireworks. Date 6 April 2006 Source United States Minte