2014 Limited Edition Silver Proof Set Grades. Limited to a production of only 50,000 sets. Set has the following Coins: 2014 W Silver Proof American Silver Eagle 2014 S Silver Proof National Park Quarters The 5 Coins are Great Smoky Mountains National Park, Tennessee, Shenandoah National Park, Virginia, Arches National Park, Utah, Great Sand Dunes National Park, Colorado, and Everglades National Park, Florida.. 2014 S Silver Proof Kennedy Half Dollar 2014 S Silver Proof Roosevelt Dime The Silver Proof American Silver Eagle Coin is the collector version of the official United States Mint American Silver Eagle Bullion Coin. This coin contains .999 fine silver and bears the W mint mark of the United States Mint at West Point. The 5 Quarters, Half Dollar, and Dime are struck in 90 percent silver, AKA coin silver and bear the S mint mark of the United States Mint at San Francisco Over 2oz of Pure SIlver