If you love collecting coins or simply enjoy checking your change, here’s a penny that could surprise you. The RPM (Repunched Mint Mark) Lincoln Wheat Penny, specifically the S/S mint mark, has sold for up to an incredible $33K Millon While it may look like an ordinary penny at first glance, the minting error it carries makes it a highly valuable find in the world of numismatics. In this post, we’ll explain what makes this coin so special and how you can identify one.
What is an RPM (Repunched Mint Mark)?
Understanding RPM ErrorsAn RPM (Repunched Mint Mark) occurs when the mint mark—such as the “S” for the San Francisco Mint—is accidentally stamped more than once on a coin. However, the second impression of the mint mark is slightly misaligned, creating a visible shadow or doubling effect
This error is caused by the manual minting process, where mint marks were hand-punched onto the coin dies. If the mint mark wasn’t properly aligned, it resulted in a doubled or blurred impression of the letter, making it clearly visible as a S/S” (S over S) mark.
Why Does the RPM Occur?
Before modern machinery, mint marks were added to coins by hand. Over time, dies would wear out or become misaligned, resulting in a second, faint impression of the mint mark in a different position. These errors weren’t intentional, which makes them rare and desirable for collectors.
The $33,000 RPM Lincoln Wheat Penny
One of the most notable RPM Wheat Pennies is the 1955-S Lincoln Wheat Penny with an S/S RPM. This particular penny has fetched $33,000 at auction due to its distinct repunched mint mark and excellent condition. While this is an extreme example, even other RPM pennies with less visible errors can still be worth hundreds to thousands of dollars depending on their condition and clarity.
Why Is This Penny Worth So Much?
The main reasons for the value of the 1955-S RPM Lincoln Wheat Penny are its rarity and the strong visibility** of the error. RPM errors are rare because they are mistakes during the minting process, and only a few of these coins were produced before the error was corrected. When you find one in excellent condition, it becomes an even more desirable piece for collectors.
How to Spot an S/S RPM Wheat Penny
Identifying a Repunched Mint MarkIf you’re wondering whether you have a 1955-S or other RPM Lincoln Wheat Penny, here’s how you can check:
1. Examine the Mint Mark:- Look for Wheat Pennies from the 1940s and 1950s that feature an S mint mark just below the year.
2. Use Magnification: Using a magnifying glass or a coin microscope is key for spotting fine details. Look for a doubling effect or a shadow-like appearance of the “S” mint mark.
3.Look for the “S/S” Mark: If you see a second, fainter “S” overlapping the first one, you may have found an S/S RPM
4.Get It Graded: To confirm the value of your coin, it’s always best to have it professionally graded by a reputable coin grading service like PCGS or NGC
| Mint Mark | Year Range | Error Type |
| S/S | 1940s–1950s | Repunched Mint Mark (RPM) |
Why Are RPM Coins So Valuable? The Rarity of RPMs
RPM coins are valuable for several reasons. First and foremost, they are minting errors—mistakes that were never meant to happen. Since these errors are rare, coins featuring them are highly collectible, especially when the mint mark is clear and visible. Additionally, older RPM pennies that have been **well-preserved over the years become even more desirable for collectors, driving up their value.
The 1955-S RPM penny is particularly valuable because it represents one of the clearest examples of this error. However, it’s important to note that even lower-grade RPM coins can still fetch substantial prices, depending on how visible the **repunched mint mark is.
5 FAQs About the S/S RPM Lincoln Wheat Penny
1. What is an RPM in coin collecting?
An RPM stands for Repunched Mint Mark. It happens when the mint mark (such as “S” for San Francisco) is stamped more than once, creating a visible doubling effect or shadow on the coin. This is considered a minting error and makes the coin valuable.
2. Which RPM Wheat Penny is worth $33,000?
The most valuable RPM Wheat Penny is the 1955-S Lincoln Wheat Penny with an S/S repunched mint mark. This coin, in excellent condition, sold for $33,000 at auction due to its rare minting error.
3. How can I tell if my penny has an S/S RPM error?
Look for a Wheat Penny from the 1940s or 1950s with an “S” mint mark. Use a magnifying glass** to check if there is a second, faint “S” overlapping or slightly shifted from the main mint mark. This is the key indicator of an S/S RPM
4. Are all RPM coins valuable?
Not all RPM coins are worth a fortune, but they can still be valuable. Coins with clear, well-defined errors** and those in excellent condition are worth more. Lower-grade coins with visible errors can still fetch **hundreds or thousands** depending on their condition.
5. Should I get my coin professionally graded?
Yes, if you suspect your penny has an RPM error it’s a good idea to get it professionally graded**. A certified grading service can confirm the authenticity of the error and give you an accurate value, which is especially important if the coin is potentially worth a large sum.
Conclusion
The S/S Repunched Mint Mark (RPM) Lincoln Wheat Penny is a perfect example of how a small minting mistake can turn an ordinary penny into a rare and valuable collector’s item. A 1955-S RPM penny recently sold for $33,000, and even lesser-grade versions can be worth significant amounts. If you’re into coin collecting or just love checking your change, take a moment to look for these hidden treasures—your next find could be worth more than you think!