1978-S Roosevelt Dime Value: Is Your Proof Coin Worth Much?

The 1978-S Roosevelt Dime value ranges from approximately $3 in typical Proof condition to over $500 for high-grade specimens. Finding one of these shiny coins in a collection or a drawer is exciting, and understanding its specific place in numismatic history helps determine if you have a common filler or a rare investment piece.

Condition / Grade	Estimated Value
PR 65 (Standard Proof)	$3.00 – $5.00
PR 69 Deep Cameo	$15.00 – $25.00
PR 70 Deep Cameo (Perfect)	$350.00 – $650.00

Understanding the Unique 1978-S Proof Roosevelt Dime

If you have discovered a 1978 dime with a small “S” mint mark near the date, you are looking at a Proof coin minted in San Francisco. Unlike the dimes meant for daily spending produced in Philadelphia or Denver, these were created specifically for collectors using polished dies and specially prepared planchets (blanks). Because they weren’t intended for the grocery store, finding one in your pocket change is quite rare, though it does happen when old collections are spent.

For those trying to verify what they have at home, using a top coin identifier app can save you hours of guesswork. These tools help you see if your coin has the characteristic “Deep Cameo” finish that collectors crave. A standard 1978-S dime is common, but those that have survived in pristine, mirror-like condition are the ones that fetch premium prices at auction.

The CoinKnow app is particularly helpful here, as it allows you to compare your coin’s luster against high-resolution images of certified grades. Most 1978-S dimes were sold in sets of six coins, including the penny, nickel, quarter, half dollar, and dollar. If yours is still in its original plastic case, it is more likely to retain its maximum value.

Grading and the Impact of Deep Cameo Surfaces

When we talk about the value of a 1978-S dime, everything hinges on “CAM” or “DCAM” designations. Proof coins are struck twice, which gives them sharp details. A “Cameo” (CAM) coin has a nice contrast between the frosted portrait of FDR and the mirror-like background. A “Deep Cameo” (DCAM) has a very heavy frost that makes the image almost pop off the surface like a 3D sculpture.

Because the Mint produced over 3 million of these proof sets, a basic 1978-S dime isn’t “rare” in a historical sense. However, getting a grade of PR 70 (perfect) is incredibly difficult. Most coins have tiny microscopic scratches called “hairlines” from being handled or sliding around in their packaging.

You can check the current market trends for high-grade 1978 proof dime auction results to see how much a perfect specimen is currently fetching. Even a slight fingerprint can drop the value from $100 down to $3, so handling your coin by the edges is essential.

Designation	Visual Description	Value Multiplier
Brilliant Proof	All shiny, no frost	Baseline ($3)
Cameo (CAM)	Moderate frost on FDR	2x Baseline
Deep Cameo (DCAM)	Heavy, snow-white frost	10x – 50x Baseline

1978-S Roosevelt Dime Mint Errors to Look For

While most 1978-S dimes are perfectly struck, errors can occur even in the San Francisco Mint. Collectors are always on the hunt for “Off-Center” strikes or “Double Dies.” An off-center strike happens when the coin isn’t lined up correctly, leaving part of the design missing and a blank crescent of metal on one side.

Double Die Obverse (DDO) coins show a slight doubling of the letters or the date. On a 1978-S, this is extremely rare because proof coins are inspected closely. However, if you find one, the value could skyrocket into the hundreds of dollars. Before getting too excited, use CoinKnow to zoom in on the “S” mint mark. Sometimes what looks like a double die is actually “Machine Doubling,” which doesn’t add much value.

Another thing to look for is “Clipped Planchets,” where a piece of the coin is missing with a smooth, curved edge. While these are more common on business-strike coins from Philadelphia or Denver, a proof-struck clipped planchet would be a major find for any specialist.

Comparison with 1978 No-Mint Mark and D Dimes

To understand why the “S” is special, you have to look at its cousins. The Philadelphia Mint produced hundreds of millions of dimes in 1978 that have no mint mark. Similarly, the Denver Mint used a “D” mark. These coins were made for circulation and are generally only worth their face value of 10 cents unless they are in absolutely flawless condition.

The 1978 dime price for uncirculated business strikes shows that even “ordinary” dimes can be worth $10 to $50 if they have “Full Bands.” This refers to the horizontal bands on the torch on the back of the coin. If the lines are crisp and separated, the coin is highly desirable.

However, the 1978-S is different because it was never meant to have full bands in the same way; its beauty is in its mirror-like finish. While a “D” dime might be worth money because it survived a harsh life in circulation, the “S” dime is worth money because it represents the peak of minting technology for that year.

Mint Mark	Mintage Quantity	Primary Value Driver
None (Philadelphia)	663,980,000	Full Torch Bands
D (Denver)	282,099,700	Mint State Grade
S (San Francisco)	3,127,781	Cameo Contrast

Tips for Selling Your 1978-S Roosevelt Dime

If you think you have a high-value 1978-S dime, don’t rush to the nearest pawn shop. Pawn shops usually pay a fraction of the coin’s actual worth because they need to flip it quickly. Instead, consider getting the coin “attributed” if it looks perfect. If you suspect it would grade at PR 70, sending it to a service like PCGS or NGC is the only way to realize that $500+ value.

For most casual finders, marketplaces like eBay are the best bet. Look at “Sold” listings rather than “Active” listings to see what people are actually paying. Often, you’ll see a 1978-S Proof Dime sell for $5 individually, or $15 as part of a complete 1978 Proof Set.

When listing, use the CoinKnow photo feature to take clear, macro shots of the coin. If the buyer can see the “DCAM” frost clearly, they are much more likely to bid higher. Always mention if the coin has any “toning”—sometimes these silver-colored clad coins can develop beautiful blue or gold hues over time, which some collectors find very attractive.

How to Store and Preserve Proof Dimes

Because many 1978-S dimes are valued for their flawless surfaces, storage is critical. If your dime is loose, do not keep it in a jar with other coins. The copper-nickel clad surface is relatively hard, but the polished “fields” (the flat parts) scratch very easily. Once a proof coin has scratches, it loses its “Cameo” appeal and its value drops significantly.

The best way to store these is in a “2×2” cardboard flip or a plastic capsule. Avoid containers made with PVC, as the chemicals can leak out over decades and create a green, sticky residue that ruins the coin’s value.

If you have a full 1978 proof set, keep it in its original lens. The US Mint designed these cases to be airtight enough to protect the coins for generations. If you see “clouding” on the inside of the plastic, it is usually better to leave the coins inside rather than trying to break them out and clean them. In the world of coin collecting, cleaning a coin almost always destroys its numismatic value.

FAQ

Q: Does the 1978-S Roosevelt Dime contain silver?

A: No, the 1978-S Roosevelt Dime is a clad coin made of 75% copper and 25% nickel over a pure copper core. The US Mint stopped making 90% silver dimes for general proof sets in 1964, though they later reintroduced silver proofs in 1992.

Q: Why is my 1978 dime missing a mint mark?

A: If your 1978 dime has no mint mark, it was minted in Philadelphia. These were produced for general circulation and are extremely common. Millions are still in use today and are generally worth only ten cents unless they are in “uncirculated” condition.

Q: What is the most expensive 1978-S dime ever sold?

A: While prices fluctuate, a 1978-S Roosevelt Dime graded PCGS PR70DCAM (the highest possible grade with perfect contrast) has sold for over $500 at major auctions. Most specimens, however, sell for under $10.

Q: How can I tell if my 1978-S dime is a “Deep Cameo”?

A: Look at the portrait of Franklin D. Roosevelt. If it looks white and frosted, like it reflects no light, while the background is dark and mirror-like, it is likely a Deep Cameo. If the whole coin is just shiny, it is a standard brilliant proof.