National Park Foundation Series. "Established to conserve America's natural beauty and wildlife, the National Park Service and Foundation cares for over 83 million acres of our nation's most diverse territory. The national parks are host to a variety of wildlife, and Breyer celebrates these regal animals with this special collection. A portion of the proceeds from this series benefits and supports our nation's protected Parks." www.breyerhorses.com.
Ongoing research to see if/when the USA Stamp was removed from this mold.