No. The sets were only struck in 40% silver.
The Abraham Lincoln Bicentennial silver dollar was struck in Proof and Uncirculated versions. Both are valued the same at $29.00
The San Francisco Mint struck 3 different bicentennial Kennedy halves. A copper-nickel proof, 40% silver proof and a 40% silver uncirculated coin. The C/N proof is $1.05, both 40% coins have the same value of $6.00.
If you are referring to a dual-dated 1776-1976 Bicentennial dollar, circulation issues were struck in copper-nickel and are worth face value only. Proofs and mint-set coins were struck in both copper-nickel and 40% silver. The silver coins sell for 7 or 8 dollars, the copper-nickel ones for about $3.
None of the Bicentennial half dollar coins made for general circulation contain any silver or are worth more than face value. Only Proof and collectors coins sold from the US Mint are worth more.
Many distilled beverages are 100 rather than 80 proof or are available as both 80 and 100 proof. Smirnoff makes a 100 proof vodka, for example, as well as 80 proof, but so do many other producers.
All 3 Bicentennial coins - quarters, halves, and dollars - were minted with dual dates 1776-1976. To meet anticipated demand the Mint took the unusual step of issuing coins with the same date during both 1975 and 1976, so there are no 1975-dated quarters, halves, or dollars. Dimes, nickels, and cents were minted with the 1975 date and are not errors or rare. All circulation Bicentennial coins were struck from copper-nickel and are only worth face value if circulated. Uncirculated and proof issues were struck in both copper-nickel and 40% silver; these are worth a premium if in their original holders or another form of encapsulation.
The 1993 Proof Thomas Jefferson 250thAnniversary commemorative silver dollar was issued as proof & uncirculated. Both have the same retail value of $19.00.
The proof and uncirculated versions of this coin are both valued at $15.00 each.
There is no such coin, for two reasons:> The last circulating silver US quarters were dated 1964.> There are no 1975-dated quarters, halves, or dollars. In honor of the Bicentennial, during both 1975 and 1976 those denominations all carried the dual date 1776-1976.Bicentennial quarters were minted from 40% silver for sale to collectors. As of 2014 they're worth a few dollars in their original packaging, but none are dated 1975.
Both versions (Proof & Uncirculated) of this coin have the same average retail value of $115.00
There aren't 112 proof state quarters. There are only 50 proof state quarters, (along with 6 in the DC/US territories). Unless you are meaning you had both the clad (copper-nickel, common) proofs and the silver proof sets. But just about every clad US proof state quarter is worth about $1 or so, silver proof quarters go for about $7-8 or about fifty cents or a dollar above melt value individually.
The 2001 American Buffalo silver dollar was issued as Uncirculated (D mintmark) & Proof (P mintmark). Both have the same current market value of $100.00.