Die States, Strike Quality & the PMD Trap: A Die Variety Specialist’s Guide to Evaluating Early vs. Late Die State Cents

A coin struck from a fresh die looks nothing like one struck from a dying one. The difference is dramatic — and understanding it is the single most important skill a die variety collector can develop.

I come back to this truth almost every week in my work as a die variety specialist. Whether I’m examining a Morgan dollar under 15x magnification or reviewing close-up macro photographs of Lincoln cents posted on collector forums, the same question keeps surfacing: Is this a genuine mint error or a post-mint alteration? The answer nearly always lies in understanding the full life cycle of a die — from the moment it’s fresh out of the annealing furnace to the day it’s retired, cracked, and ready for the scrap bin.

Recently, a fascinating forum thread caught my attention. A collector had found a 1963-D Lincoln cent bearing what appeared to be a raised “&” (ampersand) symbol on both the obverse and reverse. Was it a one-of-one die variety? A mysterious mint mark? Or was it something far more mundane? The discussion that unfolded is a perfect case study in die states, strike characteristics, and the ever-present challenge of distinguishing genuine die varieties from post-mint damage (PMD). Let me walk you through it.

Understanding Die Life: From Fresh to Fatigued

Every coin begins its life at the moment a pair of hardened steel dies come together under enormous pressure — typically between 30 and 100 tons per square inch, depending on the denomination and era. But not all die pairs are created equal. The condition of the die at the moment of striking has a profound effect on the appearance — and the numismatic value — of the finished coin.

Early Die State (EDS)

When a die is brand new — freshly hubbed and polished — it produces coins with razor-sharp detail. Every letter, every line in Lincoln’s hair, every wheat stalk on the reverse will be crisp and fully defined. The fields will be smooth and mirror-like on proof coins, or uniformly textured on business strikes.

Key characteristics of an Early Die State strike include:

• Full detail transfer: All design elements from the die are faithfully reproduced on the planchet, including the finest lines and micro-details.
• Sharp mintmark and date: No doubling, no blurring, no missing serifs.
• Clean fields: No signs of die deterioration, pitting, or flow lines.
• Strong luster: Original mint luster will be undisturbed and vibrant — a hallmark of mint condition that drives collectibility.

Mid Die State (MDS)

After thousands of strikes, the die begins to show wear. Metal flow from the planchets gradually erodes the highest points of the die’s design. You’ll start to see slight softening of fine details, especially in the central design elements that receive the most pressure. The beginnings of die flow lines appear — thin, parallel lines in the fields caused by metal flowing outward from the center of the coin during striking. Mintmark and date remain strong, but minor flat spots may appear on high points of letters.

This is the stage where eye appeal can actually remain quite high, and many collectors find mid die state coins to be excellent value — they still look sharp but may carry subtle characteristics that make them more interesting than a generic example.

Late Die State (LDS) and Terminal Die State (TDS)

This is where things get interesting — and where collectors need to pay the closest attention. In the late stages of a die’s life, deterioration accelerates. The die may develop:

• Die cracks: Raised, irregular lines on the coin where the die itself has fractured. These are not scratches — they are raised metal pushed into the crack in the die.
• Die breaks (cuds): Large, raised, blob-like areas of metal where a piece of the die has actually broken away, leaving no design to strike that region.
• Die deterioration doubling (DDD): A form of mechanical doubling caused by the die chipping and eroding around design elements, creating a “shelf” or “spread” effect. This is often mistaken for the far more valuable hub doubling.
• Heavy flow lines: Prominent lines radiating from the center of the coin, giving the fields a slightly rough or “orange peel” texture.
• Clash marks: We’ll address these in detail below, as they’re critical to understanding the forum discussion.

Terminal die state coins can be genuinely dramatic — and some command significant premiums as rare variety examples. But they can also be confused with post-mint damage, which is why careful attribution matters so much.

Die Clash Marks: The Ghosts in the Machine

One of the most common — and most misunderstood — die state phenomena is the die clash. This occurs when a planchet fails to feed into the striking area, and the obverse and reverse dies slam directly into each other with no metal between them. The result? Each die imprints a mirror image of its opposite onto its own surface.

On the finished coin, clash marks appear as incuse (sunken) areas of design elements that don’t belong on that side. On the obverse of a Lincoln cent, you might see a faint impression of the Memorial building appearing as a ghostly, incuse image across Lincoln’s face. On the reverse, you might see portions of Lincoln’s portrait faintly visible in the fields around the Memorial.

Here’s the critical distinction: clash marks are raised on the die (because they’re incuse impressions pressed into the steel) but appear incuse (recessed) on the coin. Getting this relationship straight is essential for evaluating any unusual feature.

As a die variety specialist, I’ve examined thousands of clashed die coins. Here’s what I look for when confirming a genuine clash mark:

1. Mirror-image correspondence: The clashed design element should be a mirror image of the opposite die’s design, often rotated or offset depending on how the dies met.
2. Consistent orientation: Multiple coins from the same die pair should show the same clash pattern in the same location.
3. Soft, rounded edges: Clash marks are pressed into the die under enormous pressure, so they tend to have smooth, rounded transitions — not sharp, angular edges.
4. Field disruption: The clash area may show slight flattening or polishing of the surrounding field, as mint workers sometimes attempted to polish out clash marks to extend die life.

Weak Strikes and Die Deterioration: When the Pressure Drops

Not all strike issues are caused by die wear. Sometimes the problem is mechanical — insufficient striking pressure, misaligned dies, or improper planchet preparation. But die deterioration can mimic a weak strike, which is why understanding the difference is essential for accurate attribution.

Die Deterioration Doubling (DDD) vs. Hub Doubling

This is one of the most important distinctions in all of variety collecting. Die deterioration doubling occurs when a worn, eroded die produces a slightly doubled image because the metal of the die around a design element has chipped or worn away, creating a secondary “shelf” around the primary image.

Hub doubling, by contrast, occurs during the die creation process when the hub (the master design tool) impresses the die multiple times at slightly different angles. This creates a much sharper, more defined secondary image — and it’s significantly more valuable to collectors.

Here’s a quick comparison:

• DDD: Blurry, thick, “smeared” appearance; often only on one side of the letter; consistent across all coins from that die.
• Hub doubling: Sharp, distinct secondary image; often shows rotation between the primary and secondary images; may be visible on both sides of a letter.

I’ve seen collectors get genuinely excited about DDD, thinking they’ve found a rare variety. It’s an honest mistake — but learning to tell the two apart will save you disappointment and money.

Repolishing Dies: The Mint’s Attempt at a Fix

When mint workers noticed a die developing clash marks or early signs of deterioration, they would sometimes repolish the die to remove the problem. This process could remove clash marks entirely, leaving a slightly polished or flattened area in the field where the clash had been. It could sharpen worn design elements temporarily, though the die would continue to deteriorate. And it could create unusual surface textures in the fields — sometimes called “die polishing lines” or “flow lines” — that are visible under magnification.

Repolishing is a double-edged sword for collectors. On one hand, it extended the useful life of a die. On the other, it can obscure or erase genuine die varieties, making them harder to identify and attribute. When I’m examining a coin with an unusual patina or surface texture in the fields, repolishing is one of the first things I consider.

The Forum Case Study: PMD or Die Variety?

Now let’s return to the forum thread that inspired this article. The collector who posted the 1963-D cent with the “&” symbols raised a question that every variety specialist encounters regularly: How do I know if this is genuine?

The collector’s initial hypothesis — that the raised symbols were the result of a die marked for inspection by mint employees — is understandable but, as experienced forum members quickly pointed out, not consistent with how the U.S. Mint operates. Here’s why:

“If the mint were to deliberately damage or deface a die because it failed an inspection, it would simply be destroyed; they wouldn’t carve ampersands on it and then strike coins with it.”

This is absolutely correct. The U.S. Mint has strict quality control procedures. A die that fails inspection is destroyed — not modified, not marked, and certainly not used to strike coins for circulation.

Furthermore, there’s a fundamental mechanical principle at work here that every collector should understand:

“A ‘mark’ carved or stamped onto a die would create a raised mark on the coin, not an indented one. To create an indent on a coin by modifying a die is surprisingly difficult, as you would have to ‘add material’ somehow to the die’s surface in such a way that it wouldn’t simply fall off or flatten.”

This is a critical concept. The minting process works by pressing a planchet between two dies. Any feature that is raised on the die will appear incuse (recessed) on the coin. Any feature that is incuse (recessed) on the die will appear raised on the coin. It’s a mirror-image, positive-negative relationship.

So if someone wanted to create a raised “&” symbol on a coin by modifying a die, they would need to remove metal from the die in the shape of an ampersand — carving it into the die’s surface. This is theoretically possible but extraordinarily impractical, as the carved area would quickly fill with metal during striking and the detail would be lost after just a few coins.

The Counterpunch Explanation

The far more likely explanation — and the one that the forum community converged on — is that the symbols were created by a counterpunch applied after the coin left the mint. This is a well-known form of post-mint alteration.

Here’s how it works:

1. A person obtains a metal punch — a hardened steel tool with a raised design (in this case, an “&” symbol).
2. They place the punch against the surface of a coin.
3. They strike the back of the punch with a hammer, driving the design into the coin’s surface.
4. The result is an incuse (sunken) impression on the obverse where the punch struck — and a corresponding raised area on the reverse, because the force of the punch displaced metal through the thickness of the coin.

This is exactly what forum member Sapyx described:

“A well-braced punch applies downwards force only on the area directly underneath the punch. This will displace the metal, but downwards, pushing ‘out’ the metal on the opposite side of the coin. Which is indeed what we see here, with a flattened spot on the memorial, opposite/underneath where the punch on Abe’s face landed.”

The presence of a flattened area on the reverse, directly opposite the mark on the obverse, is a telltale sign of a counterpunch. The metal didn’t appear from nowhere — it was displaced from the area directly beneath the punch. That kind of metal displacement is something I always look for when evaluating whether a feature is mint-originated or post-mint.

The Optical Illusion Problem

One of the most valuable lessons from this forum thread is the danger of optical illusions in coin photography. The collector initially insisted that the “&” symbols were raised — which would have been extremely difficult to explain through any known minting or alteration process.

But experienced collectors pointed out that the lighting in the photographs was inconsistent. The date and “LIBERTY” were lit from above (as expected), but the “&” symbol appeared to be lit from below — a clear indication that the symbol was actually incuse (recessed) and the camera angle was creating a shadow reversal.

As the collector later admitted:

“Well, after re-checking the coin under the microscope, I am eating crow. You were all correct and my assertion that the symbols were raised was incorrect. I was definitely fooled by an optical illusion.”

This is a humbling but important lesson for all collectors. Never rely solely on photographs when evaluating a potential die variety or error. Always examine the coin in hand, under proper lighting, with magnification. And even then, be aware that optical illusions can deceive even experienced eyes. I’ve been caught by them myself — it happens to the best of us.

Actionable Takeaways for Buyers and Sellers

Based on this case study and my years of experience as a die variety specialist, here are my recommendations for collectors evaluating potential varieties:

For Buyers:

• Always examine in hand before purchasing. Photographs can be misleading, especially for unusual features. Provenance matters, but your own eyes matter more.
• Learn the minting process. Understanding how dies are made, how coins are struck, and how dies deteriorate will help you distinguish genuine varieties from PMD — and dramatically improve your eye for collectibility.
• Check for metal displacement. If a raised feature appears on one side of a coin, look for corresponding evidence of displacement on the other side. This single check will save you from the most common PMD traps.
• Consult multiple references. Use resources like A Guide Book of United States Coins (the Red Book), the CONECA Master Die File, and online databases like VAMWorld (for Morgan and Peace dollars) or the Lincoln Cent Resource.
• Beware of “too good to be true.” If a coin appears to be a unique or one-of-a-one variety, be extra cautious. Genuine rare varieties are well-documented, and finding a truly undiscovered major variety is exceedingly rare.

For Sellers:

• Disclose everything. If you’re unsure whether a feature is a genuine die variety or PMD, say so. Honesty builds trust and protects your reputation in this community.
• Get a second opinion. Submit the coin to a reputable third-party grading service (PCGS, NGC, or ANACS) with a variety attribution request. A proper attribution adds confidence and value.
• Document thoroughly. Take high-quality photographs from multiple angles, with consistent lighting, and include a scale reference. Good documentation supports both provenance and eye appeal.

For All Collectors:

• Study die states systematically. Collect a progression of coins from the same die, showing early, mid, and late die states. This is one of the best ways to train your eye — and it’s genuinely fun to assemble.
• Join a specialty club. Organizations like CONECA (the Combined Organizations of Numismatic Error Collectors of America) and the John Reich Collectors Society offer resources, publications, and mentorship for variety collectors.
• Handle coins carefully. Always hold coins by the edge, use cotton gloves when appropriate, and store them in archival-quality holders. Preserving luster and surface quality protects both numismatic value and eye appeal.

Resources for Further Study

For collectors who want to deepen their knowledge of die varieties, die states, and error identification, I recommend the following resources:

• Error-Ref.com: A comprehensive online database of known mint errors and die varieties.
• VAMWorld.com: The premier resource for Morgan and Peace dollar die varieties (VAMs).
• CONECA.org: The leading organization for error and variety collectors, with an extensive online die variety library.
• “The Illustrated History of United States Coins” by Walter Breen: A foundational text for understanding the minting process and its quirks.
• “A Guide Book of Die Varieties of United States Coins” by John Wexler and John Flynn: An essential reference for variety attribution.

Conclusion: The Enduring Fascination of Die Varieties

The 1963-D cent forum thread may have ended with a whimper rather than a bang — the “variety” turned out to be post-mint damage, not a one-of-one die variety — but the discussion itself was a masterclass in numismatic analysis. It demonstrated the importance of understanding die states, the mechanics of the minting process, the principles of metal displacement, and the ever-present danger of optical illusions.

As a die variety specialist, I can tell you that the vast majority of “unusual” coins that cross my desk turn out to be PMD. But that doesn’t make them worthless — it makes them interesting. Every coin tells a story, and sometimes the story isn’t about how the coin was made, but about what happened to it after it left the mint. A counterpunched “&” on a 1963-D cent may not be a treasure, but it’s a conversation piece — a reminder that coins pass through many hands, and each one leaves its mark.

More importantly, the process of investigation — the careful examination, the respectful debate, the willingness to be corrected — is what makes coin collecting such a rewarding pursuit. The collector who posted that thread didn’t find a rare variety, but they found something arguably more valuable: a deeper understanding of the hobby and a community of experts willing to share their knowledge.

So the next time you find an unusual coin in your collection, don’t rush to conclusions. Examine it carefully. Study the die state. Look for clash marks, die cracks, and flow lines. Check for metal displacement. And above all, stay curious. Because in this hobby, the coin that looks like nothing special at first glance might just be the one that teaches you the most.