Year: 1999 Mint: San Francisco Composition. 900 Pure Silver Diameter: 24.26 mm Grade: Uncirculated. These are the 1999 Silver quarters... This complete Set of Certified 70 quarters are from the year 1999 (First year of issue), and consist of the following 5 states.(SILVER) This quarter set is graded by ICG, one of the top independent numismatic grading services. All the coins are individually graded and Certified 70..70 being the best. And is the rarest and most valuable set in the series. The item "1999 Silver Quarter Set ICG PR70DCAM Intercept shield" is in sale since Thursday, November 17, 2011. This item is in the category "Coins & Paper Money\Coins\ US\Quarters\State Quarters (1999-2008)". The seller is "dgbountyhunter01" and is located in EAST COAST USA. This item can be shipped to United States.