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The 1991-S Lincoln Penny is worth anywhere from $1 in typical proof condition to over $1,500 for rare, high-grade specimens. While most found in leftover collections are worth just a few dollars, certain “Deep Cameo” versions attract serious collectors looking to complete historical sets.
| Condition / Grade | Estimated Value |
|---|---|
| PR 65 (Standard Proof) | $1.00 – $3.00 |
| PR 69 Deep Cameo | $15.00 – $25.00 |
| PR 70 Deep Cameo | $150.00 – $450.00 |
| Auction Record (Highest) | $1,500+ |
Understanding the 1991-S Lincoln Memorial Penny
If you have discovered a penny from 1991 with a small “S” mint mark under the date, you are looking at a Proof coin. Unlike the billions of pennies minted in Philadelphia or Denver for general circulation, the “S” version was struck at the San Francisco Mint specifically for collectors. These coins were never meant to buy a candy bar or sit in a tip jar.
To identify if your coin is a high-value rarity or a common collectible, using a top coin identifier app can help you zoom in on the specific strikes and surface qualities that collectors crave. The 19910-S cent features the classic Lincoln portrait by Victor David Brenner and the Memorial reverse by Frank Gasparro.
Because they were sold in protective plastic “Proof Sets,” many have survived in excellent condition. However, if yours was removed from its case and handled, its value drops significantly. Many beginners use CoinKnow to quickly scan their pocket change to see if a stray proof coin has accidentally entered circulation.
Your Old Coin Could Be Valuable!
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The Distinctive Cameo Effect on 1991-S Pennies
When discussing the 1991-S Lincoln Penny value, the term “Cameo” is essential. The San Francisco Mint used specially prepared dies to create a contrast between the frosted design elements (like Lincoln’s face) and the mirror-like background fields. This visual “pop” is what makes these coins beautiful.
Coins are graded on a scale from 1 to 70. For a 1991-S penny, only “Deep Cameo” (DCAM) or “Ultra Cameo” designations reach higher price points. Most 1991-S pennies are found in PR 67 or PR 68 condition, which are common. It is only when a coin reaches the perfect PR 70 grade that the 1991-S penny price guide reflects a significant jump in market value.
Your Old Coin Could Be Valuable!
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| Designation | Description | Rarity Level |
|---|---|---|
| Brilliant Proof | Shiny but no contrast | Common |
| Cameo | Moderate frost on devices | Scarce |
| Deep Cameo | Heavy frost, black mirror fields | Highly Desirable |
How Condition Affects the 1991-S Cent Value
If you find a 1991-S penny that looks dull or scratched, it is likely considered “impaired.” Even though it is a proof coin, physical damage effectively ruins its numismatic premium. Collectors want coins that look like they just left the mint.
Modern proof coins like the 1991-S were minted in the millions (over 2.8 million to be exact). Because the supply of high-grade examples is so high, a single microscopic scratch can reduce the coin’s worth to just its face value or the cost of the copper-plated zinc.
Your Old Coin Could Be Valuable!
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Checking the 1991-S penny worth information helps you understand that while rarity is low, quality is everything. Using a tool like CoinKnow can help you compare your coin’s luster to known high-grade examples before you decide to pay for professional grading services like PCGS or NGC.
Looking for Errors on 1991-S Lincoln Pennies
While proof coins are struck with more care than business strikes, errors can still happen. Collectors often look for “Double Dies,” though no major doubled die varieties are currently recognized for the 1991-S Proof. Instead, look for mechanical errors.
Common errors found on pennies of this era include “Repunched Mint Marks” (RPM) or planchet flaws. However, because the quality control at the San Francisco Mint is so high, finding an error on a 1991-S is extremely rare. If you do find one—such as an off-center strike or a die crack—the value could skyrocket to several hundred dollars.
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| Potential Error Type | Estimated Value Increase |
|---|---|
| Off-Center Strike | $50 – $200+ |
| Die Break (Cud) | $20 – $100 |
| Struck Through Grease | $5 – $15 |
Comparison: 1991-S vs. 1991 (P) and 1991-D Pennies
It is important to distinguish the “S” mint penny from its more common cousins. The Philadelphia Mint produced over 5 billion pennies in 1991 (these have no mint mark), and Denver produced over 4 billion (marked with a “D”). These are made for everyday spending and are generally only worth one cent.
The 1991-S is different because it is a “Proof” coin. You can recognize it by the sharp rims, the mirror-like finish, and the “S” mark. While a regular 1991 penny is worth money only in nearly perfect “Mint State” (MS68 or higher), the 1991-S starts with a base collector value because of its lower mintage.
If you are unsure which version you have, CoinKnow can identify the mint mark and strike type instantly. This prevents you from getting excited over a common “D” penny that has been polished by a previous owner to look like a proof.
Your Old Coin Could Be Valuable!
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Tips for Selling Your 1991-S Proof Penny
If you decide you have a high-grade 1991-S and want to sell it, presentation is key. Do not clean the coin! Cleaning leaves tiny scratches that professional graders can detect instantly, and it will destroy the value of a proof coin.
For coins worth under $20, selling on platforms like eBay or at a local coin shop is your best bet. If you believe your 1991-S is a perfect PR 70 Deep Cameo, it may be worth sending to a grading service. Professional grading provides a certificate of authenticity that makes the coin much easier to sell to high-end collectors.
Always keep your proof pennies in airtight capsules or the original mint packaging. Exposure to air can cause “toning,” where the copper takes on a rainbow or brown hue. While some collectors love toning, most prefer the bright red (RD) brilliance of a fresh 1991-S penny.
FAQ
Q: Why is my 1991-S penny shiny?
A: The “S” signifies it is a Proof coin minted in San Francisco. These coins were struck at least twice on polished blanks to create a mirror-like finish for collectors.
Your Old Coin Could Be Valuable!
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Q: Can I find a 1991-S penny in my pocket change?
A: It is rare, but it happens. These are called “circulated proofs.” Once they have been touched and spent like regular money, they usually lose most of their collector value and are worth about 10 to 25 cents.
Q: What is the most expensive 1991-S penny ever sold?
A: A perfect PR 70 Deep Cameo specimen sold for over $1,500 at auction. However, most 1991-S pennies sell for between $1 and $5.
Q: Is there a 1991-S “no S” error?
A: No, the “No S” error is famous for 1990 pennies, but there are no confirmed reports of a 1991-S penny missing its mint mark. If you have a 1991 penny with no mint mark, it was simply made in Philadelphia.