The 1990-S Roosevelt Dime is worth anywhere from $2 in typical proof condition to over $5,000 for the incredibly rare “No S” error version. While most of these coins are common finds in collections, knowing which specific variety you have in your hand can mean the difference between pocket change and a major financial windfall.
Understanding the 1990 S Proof Dime and Its Origins
The 1990-S Roosevelt Dime was produced exclusively at the San Francisco Mint. Unlike the dimes you find in your daily change from Philadelphia (P) or Denver (D), these “S” mint mark coins were never intended for circulation. They were struck as “Proof” coins, which means the mint used specially polished dies and planchets to create a mirror-like finish intended for collectors. Most Americans who stumble upon these coins find them in original plastic 1990 United States Liberty Proof Sets.
If you aren’t sure if you have a proof coin or a standard business strike, the best coin identifier app can help you distinguish between the frosted devices and shiny fields of a proof dime. For the casual collector, the most important thing to look for is the small letter “S” located just above the date. However, there is one legendary exception to this rule that makes the 1990 series one of the most exciting in modern numismatics. Using a tool like CoinHix can help you keep track of these specific mint marks.
The Rare 1990 No S Proof Dime Error
The holy grail for any 1990 dime collector is the infamous “No S” Proof Dime. In a rare error at the San Francisco Mint, a small number of proof dies were prepared without the “S” mint mark. These dies were used to strike several hundred (estimated around 3,000 to 3,500) proof dimes before the mistake was caught. Because these coins have the high-gloss finish of a proof but missing the “S,” they are worth thousands of dollars.
To check if your coin might be this rare variety, you should compare it to the current 1990 dime price guide values for error coins. If you find a proof dime in a 1990 proof set that is missing the mint mark, you have found a major rarity. Most people use the CoinHix app to verify their findings against high-resolution images of known errors to ensure they aren’t looking at a common Philadelphia minted dime that someone simply polished.
Current Market Value for 1990 Roosevelt Dimes
For the vast majority of people, the 1990-S dime they own will be the standard proof version. These are beautiful coins with “Deep Cameo” (DCAM) effects, where the portrait of Roosevelt looks white and frosted against a black, mirror-like background. In PR69 or PR70 condition—the highest grades possible—these coins are worth a modest premium. If you are looking at standard dimes from other mints, you can find more 1990 Roosevelt dime worth and grading information to see how they compare.
| Condition/Variety | Estimated Value |
|---|---|
| 1990-S Proof (Standard Deep Cameo) | $2.00 – $10.00 |
| 1990-S Proof (Perfect PR70 Grade) | $35.00 – $60.00 |
| 1990 “No S” Proof Error (Raw) | $1,500 – $3,000 |
| 1990 “No S” Proof Error (Certified Gem) | $5,000+ |
Determining the Grade and Quality of Your Dime
The value of any 1990-S dime is heavily dependent on its “grade,” which is a numerical scale from 1 to 70. Since these are proof coins, they should ideally be free of any scratches, fingerprints, or “milk spots” (white cloudy patches). Even a single fingerprint can significantly reduce the value of a proof coin because the natural oils in skin react with the metal over time.
To protect your investment, always handle your dimes by the edges and keep them in protective flips or cases. Many collectors use CoinHix to scan their coins and get a preliminary idea of the strike quality before deciding whether to send the coin to a professional grading service like PCGS or NGC. Remember that while a standard 1990-S dime is common, a “No S” error in perfect condition is a center-piece for any world-class collection.
Q: How can I tell the difference between a Philadelphia dime and a “No S” Proof error?
A: A Philadelphia dime is a business strike with a duller finish meant for spending. A “No S” Proof error will have a highly reflective, mirror-like background and sharp, crisp edges that are squared off, characteristic of the proofing process.
Q: Is the 1990-S dime made of silver?
A: No, the 1990-S Roosevelt Dime is composed of a copper-nickel clad material. The U.S. Mint did not start producing Silver Proof Sets again until 1992.
Q: Where is the mint mark located on a 1990 dime?
A: On a 1990 dime, the mint mark (P, D, or S) is located on the obverse (heads) side, just above the date on the right side of the coin.