The Eisenhower Dollars were minted from 1971-1978. Engraver Frank Gasparro designed the new coins. The obverse had President Dwight D. Eisenhower's portrait and the reverse saw an eagle landing on the moon. Coins for collectors were struck in 40% silver, while the circulation issues were made of copper and nickel. No Eisenhower coins were issued in 1975 and no silver clad coins were struck after 1974. A special coin with the Liberty Bell and the moon on the reverse was launched in 1976. From 1977-1978 the eagle landing on the moon was placed again on the reverse. Eisenhower coins issued in silver weigh 24.59 grams, while the coins made of copper and nickel weigh 22.68 grams. All Eisenhower coins measure 38.1 mm. The Susan B. Anthony Dollars were minted from 1979-1999. Women's rights advocate Susan B. Anthony appeared on the obverse of the new dollars in 1979. No other woman's portrait (not imagined or mythical) had ever been struck on any U.S. coin. From 1981-1998 the U.S. Mint stopped issuing these dollars. One of the reasons the coins were never popular was due to their reduced size. From 1840-1978 all dollars measured 38.1 mm, while the new Susan B. Anthony coin measured 26.5 mm, only two millimeters bigger than the popular quarters. Susan B. Anthony dollars have a pure copper inner core and an outer layer made of 75% copper and 25% nickel, each weighs 8.1 grams. Both dollars were coined at the Philadelphia, Denver and San Francisco Mints