If you are referring to the the modern (1992-2011) "Silver Proof" sets, yes the coins are 90% silver.
U.S. Dimes, Quarters and Half dollars dated 1964 and before are 90% silver. All U.S. Dollar coins dated 1935 and before are also 90% silver.
There were proof sets made in 1974 and 1975 where all 8 of the coins were silver, and proof sets made during those years when none of them were silver. Assuming that your coins are in a set, check the 1 Cent coin - if it looks silver, then all the coins in the set are silver; if it looks bronze, then none of the coins in the set are silver.
Solid silver? No. The silver clad Eisenhower dollars are all 40% silver. But for 1973 not all S mintmarked coins are 40% silver. The San Francisco Mint did strike copper-nickel proof coins that were included in the proof sets for 1973. The 40% silver coins were struck as proof & uncirculated but were sold separately, so 3 different S mintmarked coins were struck in 1973.
Not at all. Many countries mint proof coins in the same metals used for circulation-strike coins, e.g., cupronickel, steel, aluminum, etc. However, some countries do mint special proof coins made from silver, gold, and/or platinum as well as those made from less-valuable metals.
Some Eisenhower Dollars were struck in 40% silver to be sold to collectors. All of these coins were minted at the San Francisco Mint, with dates 1971, 1972, 1973, 1974, and 1976. These coins were either uncirculated or proof. Uncirculated coins came in cellophane with a blue plastic token in a blue envelope. Proof issues came in a proof set-like plastic case, contained in a brown "wood grain finish" box with a gold seal on the back. The uncirculated coins are referred to as 'Blue Ike's' and the proofs as 'Brown Ike's. From 1973 to 1977 are the only years that the coins were included in the standard proof and uncirculated coin sets sold from the Mint, but these coins are NOT 40% silver. Special Bicentennial coin sets did have 40% silver coins.
Solid silver? No. The silver clad Eisenhower dollars are all 40% silver. But for 1973 not all S mintmarked coins are 40% silver. The San Francisco Mint did strike copper-nickel proof coins that were included in the proof sets for 1973. The 40% silver coins were struck as proof & uncirculated but were sold separately, so 3 different S mintmarked coins were struck in 1973.
All US Proof sets of 1964 and before have silver coins in them, the current value of a 1959 set is $28.00.
Not at all. Many countries mint proof coins in the same metals used for circulation-strike coins, e.g., cupronickel, steel, aluminum, etc. However, some countries do mint special proof coins made from silver, gold, and/or platinum as well as those made from less-valuable metals.
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 Proof sets of 1964 and before have silver coins in them, the current value of a 1958 set is $43.00 issue price was $2.10
All of the Eisenhower dollars struck for circulation have no silver regardless of date or mint mark.Only special collector coins sold by the mint were struck in 40% silver clad and were not released for circulation and are uncirculated an proof issue.The dates are 1971s-1972s-1973s-1974s and the duel dated 1776-1976s.Each 40% silver coin contains .3161oz of pure silver.
US Dimes, Quarters and Half dollars dated 1964 and before are 90% silver. All US Dollar coins dated 1935 and before are also 90% silver.
This may get a little confusing: For 1971 & 1972 all the "S" mintmarked coins are 40% silver and were struck as Proof and Uncirculated. From 1973 to 1976 the Mint issued a Copper-Nickel "S" mintmarked Proof coin along with the 40% silver issues. No silver coins were issued in 1977 & 1978.