Rare 1975-S No S Proof Roosevelt Silver Dime to be Auctioned Next Month

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GreatCollections Auction 1975 No S Dime PR67 CAC

The 1975-S No S Proof Dime, widely regarded as the world’s most valuable modern U.S. coin, is set to be auctioned on October 27th by GreatCollections. This highly rare coin, owned by an Ohio family for over 45 years, is one of only two known examples missing the “S” mint mark, a small but significant error that has turned it into a coveted item among collectors.

Discovery and Significance

The 1975-S No S Proof Dime was part of a proof set minted at the San Francisco Mint, which should have included an “S” mint mark on the dime. In 1975, the U.S. Mint produced 2.84 million proof sets, but only two sets without the “S” mint mark have been discovered, both by the same individual in California in the late 1970s.

These dime error coins were sold to coin dealer F.J. Vollmer and have since become legendary in the numismatic world. The Ohio family purchased their No S dime from Vollmer in 1978 for $18,200, a significant sum at the time, equivalent to nearly $90,000 today.

According to Scott Schechter and Jeff Garrett, co-authors of 100 Greatest U.S. Modern Coins, the 1975 No S Proof Dime ranks as the #1 modern U.S. coin. The coin has been graded PCGS Proof-67 and approved by CAC (Certified Acceptance Corporation) with the considerable public interest and could fetch over $500,000 at auction.

1975-S No S Auction History and Values

The 1975 No S Proof Dime auction history shows its increasing value over time. In 2011, the second known example sold for $349,600 at a Stack’s Bowers Galleries auction. In 2019, the same coin sold for $456,000 at Heritage Auctions. Shortly after, it was sold privately for $516,000 to the owner of the only complete collection of Roosevelt Dimes ever formed.

The current auction represents the first time this particular dime, owned by the Ohio family, has appeared in public sale. It is expected to attract a great deal of attention from collectors, with the current bid already reaching $250,000. The dime will be on display at the Great American Coin & Collectibles Show in Tampa, Florida, from September 11-14 before heading to the auction block in October.

What Makes the 1975-S No S Proof Dime Special?

The 1975 No S Proof Dime is significant because of its extreme rarity and the historical context of its creation. During this time, proof coins were struck with extra care for collectors, and the absence of the “S” mint mark is an unusual and highly collectible error.

GreatCollections Auction 1975 No S Dime PR67 CAC

Mint inspectors likely discovered this early in the first run and stopped the majority of these error dimes from being released, making the two known examples incredibly rare.

This coin stands apart from other 1975 dimes made in Philadelphia as it is a Proof coin which was only minted in San Francisco.

Collectors’ and Investors’ Interest

For collectors, the 1975 No S Proof Dime is considered a “holy grail” of modern numismatics. Its rarity, combined with the fact that only two are known to exist, drives its value. The proof coin is also in excellent condition with a Proof-67 grade, making it even more desirable.

For investors, owning a piece of modern coinage history like the 1975 No S Proof Dime can be a lucrative long-term asset. Over the years, its value has consistently appreciated, and it is expected to continue doing so due to its uniqueness.

Beware of Misleading Offers and Counterfeits

The rarity of the 1975 No S Proof Dime has led to opportunistic sellers falsely advertising common 1975 dimes as rare coins. With nearly 586 million 1975 Roosevelt Dimes produced without a mint mark, many sellers exploit the confusion between regular circulation coins and the rare proof errors. Buyers must carefully verify the authenticity and provenance of such coins, as common 1975 dimes without an “S” are not valuable.

This discovery is a reminder of how valuable certain error coins can be, especially when such a limited number of examples exist.

What Dimes Contain Silver?

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Silver Dimes

Before 1965, U.S. dimes were minted with an alloy containing 90% silver. These coins, often referred to as “junk silver,” derive their value primarily from their silver content rather than numismatic value.

Identifying Silver Dimes

The most straightforward way to identify a silver dime is by its minting date. All dimes dated 1964 or earlier are minted with 90% silver.

Additionally, when viewed from the side, silver dimes will have a solid silver appearance along the edge with no visible copper line. Modern clad dimes (post-1965) have a copper edge visible when viewed from the side.

Mercury Silver Dimes (1916-1945)

The Mercury Silver Dime was continuously minted by the US Mint from 1916 until 1945. These coins feature Lady Liberty on the obverse wearing a phrygian cap, often mistaken for the Greek God Mercury due to the winged hat.

  • Design: The Mercury Dime, officially known as the Winged Liberty Head dime, features Lady Liberty wearing a phrygian cap with wings on the obverse. This design is often mistaken for the Roman god Mercury, hence the name.
  • Composition: Each dime contains 90% silver and 10% copper.
  • Historical Significance: Designed by Adolph A. Weinman, the Mercury Dime is considered one of the most beautiful U.S. coins.

Mercury Dime Key Dates

1916-D

  • Mintage: 264,000 Denver Mint
  • Significance: Exceptionally low premier mintage of the Mercury dime from the Denver mint.
  • Value: Extremely rare and highly sought after by collectors. Coins in circulated, but good condition, can command up to $1,000. While graded Mint State 1916-D Mercury Dimes can fetch over $35,000.

1921 and 1921-D

  • Mintage: 1,230,000 (Philadelphia) and 1,080,000 (Denver)
  • Significance: Both the 1921 and 1921-D are low mintage years due to reduced coin production during the post-World War I economic slump.
  • Value: These dimes are scarce and command high prices, especially in uncirculated condition.

1942/1 and 1942/1-D Overdates

  • Mintage: Unspecified; these are error coins.
  • Significance: These overdate coins show a “1” underneath the “2” in the date. They are rare and highly prized by error coin collectors.
  • Value: Values can range significantly based on condition, often starting at several hundred dollars and going up into the thousands.

Silver Roosevelt Dimes (1946-1964)

The Roosevelt Silver Dime was introduced in 1946 and was minted with a 90% silver alloy until 1964. Beginning in 1965, the mint introduced the clad Roosevelt Dime that is still in use today.

  • Design: Introduced in 1946, the Roosevelt Dime honors President Franklin D. Roosevelt. The obverse features his portrait, designed by John R. Sinnock.
  • Composition: Like the Mercury Dime, it contains 90% silver and 10% copper.
  • Introduction Reason: The dime was introduced shortly after Roosevelt’s death as a tribute to his legacy, particularly his role in founding the March of Dimes.

Roosevelt Dime Key Dates

1949-S

  • Mintage: 13,510,000
  • Significance: The 1949-S is a key date because of its relatively low mintage compared to other Roosevelt dimes.
  • Value: In high grades, this coin can be quite valuable.

1950-S

  • Mintage: 20,440,000
  • Significance: Another semi-key date due to its lower mintage and the demand from collectors.
  • Value: Prices vary based on condition, but it is more valuable than most other dates in the series.

1951-S

  • Mintage: 31,630,000
  • Significance: This year had a higher mintage than 1949-S and 1950-S but still is considered a key date due to collector demand.
  • Value: Similar to the 1950-S, it holds a premium in higher grades.

Silver dimes, like all 90% silver US coinage are sometimes referred to as “junk silver”. This is a common term adopted from the coin collecting industry for coins that have little to no numismatic value. Their value lies strictly in the silver content.

Junk silver dimes are a great way to start investing in silver. They are fractional and you can buy them close to spot price.

Barber Dimes (1892–1916)

The Barber Dime is a historically significant ten-cent coin featuring a classic design that was minted by the United States Mint from 1892 to 1916. It is named after its designer, Charles E. Barber, who also designed the Barber quarter and half dollar. Barber’s design was chosen by the U.S. Mint after a public competition failed to yield a winning design.

  • Composition: 90% silver, 10% copper
  • Silver Content: 0.07234 troy ounces of pure silver
  • The Barber Dime was minted from 1892 until 1916. It is named after its designer, Charles E. Barber.

Although not universally praised for its artistic appeal, the Barber dime became a staple of U.S. coinage during the late 19th and early 20th centuries.

Barber Design

The obverse features a profile of Lady Liberty wearing a Phrygian cap and a laurel wreath. The inscription “UNITED STATES OF AMERICA” surrounds the portrait, with the minting year at the bottom.

The reverse has a simple design with the words “ONE DIME” in the center, surrounded by a wreath of agricultural products that include wheat, corn, and oak.

Barber Dimes are widely collected due to their historical significance and relatively short production run. While most dates are common and affordable in circulated condition, key dates like the 1894-S and well-preserved coins in higher grades can be quite valuable.

Modern Silver Proof Dimes

Since 1992, the U.S. Mint has produced silver Proof Sets containing 90% silver Roosevelt Dimes for collectors.

Modern Silver Proof Dimes are special edition coins that differ from the regular circulating dimes in terms of both their metal content and the method of production and feature a composition of 90% silver and are struck with a high-quality proof finish. These are produced at the San Francisco Mint and bear the “S” mint mark.

High-Grade Proof dimes that are graded PR69 or PR70 by professional services like PCGS or NGC are more valuable to collectors.

Silver Dimes in Circulation

The Roosevelt Dime was introduced in 1946. Billions of silver dimes were minted up until the debasement began in 1965. While many have been smelted over the years for their melt value, there are still plenty available in the wild.

The easiest way to tell if you have a silver dime is by looking at the date. All dimes that were minted prior to 1965 contain 90% silver content. If your dime is from 1964 or earlier, then it is a silver dime.

Coin roll hunting can be a great way to find silver dimes, depending on the availability of unsearched bankrolls in your area.

Silver Dime Values

At the very minimum, a silver dime is worth its weight in silver. A 90% silver dime has an overall gross weight around 2.5 grams. Therefore, it has roughly .0715 ozt of silver. Based on the spot price, the intrinsic value of silver is far more than its face value, which is the primary reason the government stopped using silver and switched to clad coins.

An easy way to estimate the value of your silver dimes is that each $1.00 Face Value, or ten silver dimes, contains .715 troy ounces of silver. This is a commonly accepted weight that takes into consideration that there may be some wear and tear from circulation.

For more information about which silver dimes may be key dates and have some numismatic value.

You can easily compare online dealer prices for 90% silver dimes: