Coins struck in 1975 and 1976 bear double date "1776–1976" Mint marks D, S. Located on the obverse beneath Eisenhower's bust. Mint mark omitted on Philadelphia Mint issues. Obverse Design Dwight D. Eisenhower Designer Frank Gasparro Design date 1971 Reverse Design Eagle clutching olive branch landing on the Moon, based on the Apollo 11 mission insignia Designer Frank Gasparro Design date 1971 (Not struck in 1975–76)