Eisenhower Ike Dollars were issued by the United States Mint from 1971 to 1978, primarily to commemorate the legacy of President Dwight D. Eisenhower. The 1977 Ike Dollar features the presidential portrait on the obverse and an eagle landing on the moon on the reverse, symbolizing the Apollo 11 mission. These coins, made of a copper-nickel clad or silver composition, are considered collectible due to their historical significance and varying mintages. The "N A" designation typically refers to the coin's grade or status within a specific grading system.