1 oz Gold Bars. Proof & Mint Sets. 2014-P 5 oz Silver ATB Great Sand Dunes SP-70 NGC (Early Release). Photos in this listing may or may not be stock photos. The photos are meant to be an indication of the product you will receive. Contains 5 oz of. NGC certification guarantees the SP-70 condition of the coin. Attributed as an Early Release indicating this coin was received by NGC within the first 30 days of the coin’s release. Obverse: Portrait of George Washington originally designed by John Flanagan, with the inscriptions of United States of America, Liberty, In God We Trust and Quarter Dollar. Reverse: Image of people panning next to a river, surrounded by Great Sand Dunes, Colorado, E Pluribus Unum and the date. Protect your perfect SP-70 America the Beautiful coin in style by adding a beautiful display box. These coins are sought after by investors for their. 999 fine Silver content and demanded by collectors for their artistic value. Add these beautiful Silver coins to your collection today! The park contains the tallest sand dunes in North America, rising about 750 feet (230 m) from the floor of the San Luis Valley on the western base of the Sangre de Cristo Range, covering about 19,000 acres (7,700 ha). Researchers say that the dunes started forming less than 440,000 years ago. This is not a photo of the actual item.