How to Spot Rare Errors on Really FedEx: A Numismatist’s Guide to Hidden Rarities

Most people look right past the tiny details that can turn a common coin into a rarity worth thousands. As an error coin hunter, I have seen this phenomenon play out time and again. We often focus solely on the date and denomination, treating a coin as mere pocket change. Yet, it is those subtle anomalies hidden within the design that elevate it from common to covetable. Just as the recent headlines regarding a massive theft at a prominent authentication company highlighted the catastrophic consequences of missing critical signatures, the numismatic world suffers from its own blind spots—where crucial details go unexamined. Today, we are uncovering the “Variety & Error Guide,” focusing specifically on identifying die cracks, double dies, and mint mark variations. These are the details that keep collectors awake at night.

The Anatomy of a Mint Mark: Unmasking Hidden Value

Why Mint Marks Matter More Than You Think

When I examine a coin under a loupe, my very first step is always to locate the mint mark. In my years of grading, I have seen countless collectors overlook this single letter or symbol, dismissing a potentially high-value variety as merely a common date. The mint mark is the fingerprint of the facility where the coin was struck, and it tells a story of production anomalies—essentially the provenance of that specific coin. A coin produced at the Philadelphia Mint (denoted by no mint mark) is fundamentally different from one produced at Denver (a “D”) or San Francisco (an “S”). These aren’t just minor administrative quirks; they represent distinct die pairs. And because the chance of an error occurring at one mint versus another is entirely different, a misidentified mint mark can completely ruin a coin’s numismatic value. When grading in mint condition, even a single misplaced letter can change the grade and worth of a coin.

Identifying Mint Mark Variations Across Mints

Mint mark errors occur when a coin is struck on the wrong planchet or when the wrong reverse die is used for a specific mint facility. For example, consider the 1992-D Lincoln Cent. Most collectors know the “D” mint mark, but what happens when a worker drops a blank onto the wrong die? You get an off-metal strike or a wrong-planchet error. I have personally encountered 1992-D cents struck on cent planchets, which can easily fetch thousands of dollars at auction. Similarly, the 1968-S Lincoln Cent features a distinct “S” mint mark. If you find a 1968-S cent with a doubled mint mark, or a 1968-P cent with an S mint mark (a wrong-mint error), you have discovered a significant rare variety. Always verify the mint mark location; on Lincoln cents, it sits beneath the date, while on Washington quarters, it is positioned directly below the rim to the right of the 1.

Die Cracks and Cuds: Reading the Wounds of the Die

The Life and Times of a Die

A coin die is a hardened piece of steel used to strike blank planchets. Over time, dies suffer immense stress from millions of hammer blows. They develop cracks, pitting, and cuds—raised bumps on the surface of the die that result in corresponding raised lines or lumps on the coin. Even highly circulated die cracks usually get cataloged by NCS or PCGS. However, when these errors appear in higher grades or uncirculated sets, they become absolute rarities. A die crack is a line that cuts across the field or through the devices of the coin. It is a stark contrast to the smooth, pristine fields of a flawless coin, lacking the rich luster of a perfect strike.

Reading the Cracks: How to Spot Them

To identify a die crack, you must look for a thin, raised line that extends across the coin’s surface. Often, these cracks intersect, creating jagged branches or “tree-like” patterns. Let’s look at a classic example: the 1998-P Lincoln Cent. This coin is notorious for a prominent die crack that runs from the rim to the lower-left shield. When grading, I look specifically for this fracture line. If the crack is sharp and well-defined, it grades better. If it is rough, filled with incuse die polish, or “capped” (covered by a blob of grease or metal), it grades lower. Another famous example is the 1982-P Small Date Lincoln Cent, which features a die crack running through the date.

Here is a quick checklist for spotting die cracks on your submissions:
* Look for thin, raised lines extending across the coin’s surface.
* Check the edges of the devices (like the rim or the wreath) for interruptions in the smooth surface.
* Examine the fields closely; die cracks often leave behind “pimples” or tiny raised bumps.
* Compare the line of the crack to the surrounding devices to ensure it isn’t just a manufacturing defect or a tooling error.

The Double Die: Separating Mechanical Doubling from True Doubled Dies

Understanding the Double Die Mechanism

When a collector hears the term “double die,” they immediately think of the legendary 1969-S Lincoln Cent. But before you jump to conclusions, you must understand the mechanics. A true doubled die occurs when a master die is improperly fed into another master die, resulting in two impressions of the same design being superimposed. This creates a distinct “fringe” along the raised elements of the coin—like the edge of a newspaper clipping pressed over itself. Conversely, “mechanical doubling” or “doubling due to striking pressure” simply occurs when a coin is struck too hard or too soft, causing the obverse and reverse dies to shift slightly during the strike. Mechanical doubling appears as a slight blur or shift, but it lacks the crisp, overlapping edges of a true doubled die.

Identifying True Doubled Dies vs. Simple Doubling

To differentiate between the two, I always start by examining the date and the legends. On a true doubled die, the doubling is usually most pronounced and easiest to see in the date and the letters of the word “LIBERTY.” I look for the characteristic fringe on the raised letters and numerals. If the doubling is only visible on the reverse, such as the wheat stalk on the reverse of a Washington quarter, it might be a doubled die pair rather than a simple doubled strike.

Let me share a personal anecdote. Early in my career, I submitted a 1970-S Lincoln Cent to a grading service. The grader initially suspected mechanical doubling. Upon closer inspection under 10x magnification, I noticed a distinct fringe on the “S” in “IN SPITE” and the date. It was a true 1970-S Doubled Die Obverse. I authenticated it, sent it to PCGS, and realized its value skyrocketed from a few dollars to hundreds of thousands. Never skip the loupe examination!

Actionable takeaway for collectors: Never assume a doubled date is just a weak strike. Always inspect the device borders for the telltale fringe.

Specific Errors to Look For: Beyond the Basics

Wrong Planchet and Off-Metal Strikes

One of the most exciting rare varieties in numismatics is the wrong-planchet error. This occurs when a blank of the wrong metal is fed into the press. For instance, a cent planchet blank might accidentally slip into the coining press meant for quarters, resulting in a Lincoln cent struck on a copper-plated zinc blank. These coins often feature a greenish patina around the rim due to the wrong metal reacting with the environment. The 1943-P cent, struck on a bronze planchet instead of a steel one during World War II, is a prime example. These errors are highly sought after because they are incredibly scarce and offer fantastic collectibility.

Broadstrike and Centering Errors

A broadstrike occurs when a coin is allowed to drop freely onto the coin collar without the obverse and reverse dies being properly aligned. This results in a coin that is much wider than normal, with the design extending to the edges. Centering errors, on the other hand, happen when the coin is struck off-center, leaving a significant portion of the blank planchet showing in the fields. Both of these errors are dramatic and visually striking, making them prized additions to any collection due to their eye appeal.

Actionable Takeaways for the Modern Collector

As an error coin hunter, my greatest fear is not finding the coin—it is losing it before it ever reaches the grading desk. Just as the recent theft at a major authentication company proved that failing to secure a package can result in catastrophic financial loss, the numismatic community faces its own risks when shipping high-value error coins. Here is what I recommend:

* Never ship high-value error coins via FedEx without a signature hold. If you are sending a potentially valuable doubled die or wrong-planchet cent to PCGS or NGC, ensure the shipping label requires a signature upon delivery. Do not leave a $30,000 collection of coins outside your door waiting for a signature that never comes.
* Consider USPS Priority Mail over FedEx. While FedEx offers speed, USPS registered mail provides a verifiable receipt and often has more consistent delivery protocols for high-value items.
* Request offsite holds. If your local FedEx facility allows it, use their offsite hold program to pick up your shipments. This reduces the risk of delivery shenanigans.
* Always authenticate locally first. Before shipping, use a loupe or a high-quality magnifying glass to confirm the error yourself. Sending a false error to a grading service is a waste of money and risks misrepresenting the coin’s grade.

Conclusion: The Lesson of “Really, FedEx?”

The recent headline “Really, FedEx?” serves as a stark reminder of how easily critical details can be missed. In numismatics, the parallel is clear: just as missing the required signature on a shipment can lead to the loss of thousands of dollars in coins, missing the subtle die crack, double die, or mint mark variation can cause a collector to walk away with commonality instead of rarity. The lesson is universal—never let the details slip past your notice.

By taking the time to examine the mint mark, study the die cracks, and differentiate between true doubled dies and mechanical shifts, you elevate your collecting from casual hobbyist to respected numismatist. The history of our coins is written not just in the designs we see, but in the microscopic imperfections that make each coin unique. Keep your loupes sharp, your eyes peeled for those tiny anomalies, and always secure your high-value finds. After all, in this business, the difference between a common wheat cent and a multi-thousand-dollar rarity often lies in the very details we refuse to look at.

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