This is a 3-inch bronze medal produced by the United States Mint to commemorate the bicentennial of the U.S. Marine Corps in 1975. Design Details: The front (obverse) shows the Continental Marines landing at New Providence in 1776, while the back (reverse) features modern Marines in action. Composition: The medal is crafted from bronze, specifically a composition of 90% copper and 10% zinc for the 3-inch version.