Sc. 5080 National Parks on a 5"x7" Dragon Card showing a sign similar to those that might be found at the entrance to a National Park. The sign reads “National Park Service Centennial.” A random single is affixed by the show pictorial for the third day of Americover 2016. That cancel represents Great Smoky Mountains National Park. This is not a first day of issue. Great for a parks- or conservation-on-stamps collection!