This is an original and official Christening Coin for the USS ENTERPRISE, the first nuclear powered aircraft carrier of the US Navy. The coin comes in its original fold-out holder AND includes the original presentation envelope. The coin measures 1.5 in diameter, and appears to be made of brass. The fold-out holder measures approximately 3.5″ X 4.5″. The envelope is slightly larger than that. This coin is pretty tough to find, especially in it’s original holder and envelope. The coin, holder and envelope are in great condition. This is a great piece of US Naval history! Please see the photos provided.