Info for 1975 U.S. coin sets?

Take close look at Proof set 10¢
Published : 05/06/12
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I have two 1975 Proof sets. In one set, the coins are in red felt, cased in a black plastic case. The other set is sealed in a plastic wrap. Note the coins in the second set do not have the S Mint marks. Can you give me some information regarding these sets?

Marc Benhoff

Address withheld

From Mr. Benhoff’s description and the image provided, it appears he possesses not two Proof sets but a 1975 Proof set and a 1975 Uncirculated Mint set.

The 1975 Proof sets were sealed in a clear plastic case with the coins framed within by a red, felt-covered paper insert, all contained within a black plastic frame. The Proof coins bear the S Mint mark of the San Francisco Assay Office.

The 1975 Uncirculated Mint sets, however, were packaged in pliofilm and were sealed in a simple white envelope bearing the words “U.S. Mint/1975 Uncirculated Coin.” The Mint set contains circulation-quality coins from the Philadelphia Mint in one pliofilm holder and coins from the Denver Mint in the other holder, with the Denver Mint coins bearing the D Mint mark.

The 1975 Proof set had an original issue price of $7, while the 1975 Uncirculated Mint set had an original issue price of $6. Interestingly, the values of the two sets today are not much different from their original issue prices.

Owners of a 1975 Proof set should be sure to take a close look at the Roosevelt dime in the set. If it doesn’t have an S Mint mark, it should be submitted to an expert for authentication. Why? Two known 1975-S Roosevelt, “No S” Proof dimes are known, and one of them sold for $349,600 in an Aug. 18, 2011, Stack’s Bowers Galleries auction.

The 1975 Proof and Uncirculated Mint sets are also interesting as they contain the dual-date 1776-1976 Eisenhower dollar, Kennedy half dollar and Washington quarter dollar. These coins bear commemorative reverses in honor of America’s Bicentennial. The only circulating U.S. coins struck with the date 1975 are the Lincoln cent, Jefferson 5-cent coin and Roosevelt dime.

The same holds true for the 1976 Proof and Uncirculated Mint sets, whereas the cent, 5-cent coin and dime are dated 1976 and the dollar, half dollar and quarter dollar again bear the 1776-1976 dual date.

Collectors should be aware of two different subtypes of 1776-1976 Eisenhower dollars — the Bold Reverse Letters, often termed Type I, and the Thin Reverse Letters, often called Type II. Many hobbyists like to collect an example of each subtype.

Coin World’s Readers Ask department does not accept coins or other items for examination without prior permission from staff member Erik Martin. Readers Ask also does not examine error or variety coins. Materials sent to Readers Ask without prior permission will be returned unexamined. Please address all Readers Ask inquiries to or call 800-673-8311, Ext. 274.

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