Silver dollars, minted from 90 percent silver and released into circulation, were last made in 1935. These were "Peace" dollars, depicting the head of Liberty on the front and an eagle on the back.
After a long hiatus from their manufacture, Congress authorized the minting of silver dollars in 1964. Some were struck at the Denver Mint, but they were never released and were melted down. Eisenhower dollars were struck at the San Francisco Mint, dated 1971 to 1978, with 80 percent silver content. They were intended for collectors' sets and not circulation. Since 1986, the U.S. Mint has produced 1-ounce silver rounds, with a face value of $1 and a coin-like Walking Liberty design. These are sold based on silver bullion pricing and are not for circulation.