Silver dollars have never been 100% silver. They were usually alloyed with about 10% other metals to give them more resistance to wear. Silver bullion coins issued by the U.S. Mint beginning in 1986 contain .9999 % pure silver.
All silver dollars made of silver contain 90% silver, but the last of those was minted in 1935. The Eisenhower dollars of the 1970s didn't contain silver.
They have never been all silver, but dimes, quarters, half dollars and silver dollars made before 1965 are 90% silver. The plain and simple answer is: 1964 was the last year
Yes, all silver dollars made in 1924 have the same basic design.
Yes, all dimes, quarters, half dollars, and silver dollars 1964 and older are 90% silver.
Half dollars have never been made out of pure silver but all half dollars minted before 1965 are 90% silver, halves dated 1965-1970 are 40% silver. Circulation issue halves dated 1971 and later are copper nickel and thus worth 50 cents. The US still makes commemorative half dollars such as the 90% silver proof half dollars made from 1992-present.
They were never pure silver, but all half dollars (as well as dimes and quarters) 1964 and earlier are 90% silver.
Yes, all US silver dollars from 1840 to 1935 are struck in 90% silver & 10% copper, this includes the Morgan series.
All 90% silver half dollars are about $10.00 just for the silver.
All US 1941 Walking Liberty half dollars are 90% silver.
silver dollars should all be 1 ounce give or take a few grams
All proof silver dollars are silver dollars, but not all silver dollars are proofs. That's because proof coins are specially struck for collectors, while (at least up till 1935 in the US) regular silver dollars were struck for use in ordinary commerce. Please see the Related Question for more details.
All US half dollars dated 1964 and prior are 90% silver (worth about $11 in scrap silver) All US half dollars dated 1965-1970 are 40% silver (worth about $5 in scrap silver) All US half dollars dated 1971-present that are circulating contain no silver and are only worth 50 cents. (The US does strike commemorative half dollars and proof silver half dollars for collectors but these are almost always found in mint packaging, not as a loose half dollar).