Mint Error or Damaged? Decoding the Surface of Clipped Planchets, Laminations, and Post-Mint Damage

Is That a Rare Lamination Flaw, or Did Someone Just Scratch It With a Screwdriver?

Is that a rare lamination flaw, or did someone just scratch it with a screwdriver? I get this question constantly. Let me show you how I tell the difference. In thousands of coins submitted to me as “mint errors,” this is the most common — and most expensive — mistake I see. A genuine clipped planchet or lamination can add a serious premium. Post-mint damage, or PMD in the trade, destroys it. I have watched a potential $500 error become a $20 damaged coin in a heartbeat.

The problem is not enthusiasm. Collectors have plenty of that. The problem is that PMD is a brilliant imitator. A file mark can look like a clip. A screwdriver gouge can look like a lamination peel. A coin pried from a tight holder, dropped on concrete, or cleaned by a well-meaning owner in 1974 can look, at first glance, like it left the Mint that way. I look at the metal itself. How did it flow? How did it break? How did it age? Did this happen before the strike, or decades after?

The old forum thread titled “Have you ever received a clipped coin from the mint” captures this perfectly. Dozens of collectors chimed in with the same story. Yes, clipped coins absolutely come from the Mint. They turn up in Mint Sets, Proof Sets, Kennedy rolls, Bicentennial sets, GSA dollar packaging, and even modern black-case Eisenhower dollar Proofs. One collector found a 1968 Mint Set at a local club auction for $10 that contained two combined cents — a packaging error — and a clipped nickel no one else noticed. Another reported blank planchets in Kennedy rolls straight from the Mint. Another tracked down a curved-clip 1882-CC Morgan dollar from the GSA Hoard in MS-63 Prooflike. These are not tall tales. They are documented, verifiable, and highly collectible. But they create a trap. Because genuine clips do exist in original packaging, every damaged coin in a Mint Set suddenly looks like a clip to its owner. My job is to separate the two, coin by coin, edge by edge.

What Is a Clipped Planchet? How the Mint Actually Creates One

A clipped planchet is not a coin cut after it was struck. It is a planchet — the blank metal disc — that was already missing metal before it ever went between the dies. I have seen this explained poorly for years. Let me walk you through it the way I explain it at club meetings.

At the Mint, large sheets or strips of metal feed through a press that punches out planchets, much like a cookie cutter punches cookies from dough. If a strip feeds slightly off-center, or if a previous punch has already removed part of the strip, the next planchet can be punched overlapping the edge. The result is not a full circle. It has a straight edge, a curved edge, or a combination of both. That incomplete planchet then goes through annealing, cleaning, and striking. When the dies strike it, the metal flows to fill the design, but it cannot create metal where none existed. The clip remains.

The Three Types of Clips I See Most Often

• Straight clip: The most common and easiest to attribute. The missing segment is bounded by a straight line. This happens when the planchet is punched at the very edge of the metal strip. The straight edge will be smooth, rounded from striking, and the design will be pushed slightly toward that edge.
• Curved clip: The missing segment is bounded by a curve, often with a slight inward bow. This happens when the planchet overlaps a previously punched hole. The edge follows the curve of the neighboring planchet. The famous 1882-CC curved clip Morgan dollar from the GSA Hoard is a textbook example — you can see the elegant arc where the punch before it robbed this planchet.
• Elliptical clip: A rarer, more dramatic form where the planchet is significantly undersized and often oval. These are frequently confused with off-center strikes, but the key is that the rim is incomplete all the way around, not just shifted.

Here is the critical diagnostic I teach every buyer: On a genuine clip, the rim is present on the clipped edge, but it is pushed outward and flattened by the strike. The metal flowed during striking. The edge will be smooth, slightly beveled, and will show the same luster and patina as the rest of the coin. The devices near the clip will be fully formed but distorted, stretched toward the missing area. Run a fingernail across a genuine clip. It feels like a normal rim, just in the wrong place. Run your nail across PMD, and you will feel a sharp, raised burr, a groove, or a rough break.

Lamination Errors: When the Metal Itself Fails

If clipped planchets are about missing metal before the strike, lamination errors are about defective metal before the strike. I have handled laminations on everything from Lincoln cents to Morgan dollars. They are some of the most misunderstood genuine errors in numismatics.

A lamination error occurs when the metal strip contains an internal flaw — a gas pocket, an inclusion of foreign material, or a region where the layers did not properly bond during rolling. When that weak area is struck, the metal cracks, peels, or flakes away. The result looks like a rough, crumbly patch on the surface, often near the rim, sometimes running through the design.

How I Distinguish a True Lamination from PMD

1. Location and flow: A true lamination will show metal flow around it. The dies struck the coin, and the defective area crumbled under pressure, but the surrounding design shows full strike. The edges of the lamination are irregular but not sharp and raised like a gouge.
2. Texture: Laminations have a granular, almost sandy texture inside the flaw. PMD gouges are smooth, shiny, or show fresh metal. In my experience, a lamination on a copper cent that has circulated for 50 years will have the same dark toning inside the flaw as on the fields. A fresh screwdriver mark will be bright and untoned.
3. Depth: Laminations are shallow, surface-level failures. They do not cut deep into the coin like a file or a knife. If the defect is deep, V-shaped, and has parallel striations, I am looking at tooling, not lamination.
4. Multiple areas: Sometimes a bad strip produces multiple lamination spots on the same coin, or even on consecutive coins from the same roll. That pattern is almost impossible to fake with PMD.

I cannot stress this enough for buyers: never pay a lamination premium for a coin that has been cleaned. Cleaning will open up a lamination, make it look worse, and give a grading service every reason to label it “damaged” rather than “error.” A genuine lamination should be preserved exactly as struck, with original luster and toning intact. That eye appeal is a big part of its numismatic value.

Post-Mint Damage: The Great Imitator and How It Fools Collectors

Post-mint damage is any alteration that happens after a coin leaves the Mint’s striking press. It includes circulation wear, environmental damage, cleaning, tooling, and intentional mutilation. For error collectors, the most dangerous forms are those that mimic planchet flaws.

In my experience grading, PMD falls into a few predictable categories. First is mechanical damage from tools: screwdrivers used to pry coins from albums or holders, pliers used to hold a coin for cleaning, files used to “smooth” a rim. Second is damage from accidents: a coin dropped on a garage floor, run over by a lawnmower, or caught in a washing machine. Third is damage from chemistry: harsh cleaning, dipping, or environmental corrosion that eats away at the surface and looks like a lamination.

I have seen a perfectly normal 1964 Kennedy half dollar, supposedly a “lamination error,” that under 10x magnification was clearly covered in parallel file marks. The owner had tried to remove a small spot of corrosion and, in doing so, created a fake error. The coin was worth less than face value as a damaged piece, not more as an error.

The Red Flags I Look For Immediately

• Sharp, raised edges: A genuine clip or lamination has soft, struck edges. PMD almost always has a sharp burr where metal was displaced, not removed cleanly.
• Fresh metal color: If the inside of a “clip” is bright, silvery, and untarnished while the rest of the coin is dark, that metal was exposed recently. The Mint did not strike it yesterday.
• Parallel striations: Tooling marks from a file, saw, or screwdriver leave parallel lines. Mint-made edges never show parallel tool marks.
• Design interruption that makes no sense: On a genuine clip, the design is complete except where metal is missing. On PMD, you will often see design elements that are cut, pushed, or smeared in ways that the strike could never produce.
• Damage that crosses the rim unnaturally: If a “clip” cuts through the rim and into the field with a clean, straight saw-like line, and the rim on either side is untouched, I am suspicious. A real clip affects the rim’s shape entirely.

Actionable takeaway for sellers: photograph your coin’s edge at an angle under strong light. Buyers and grading services will do the same. If you cannot show smooth metal flow on the edge, do not market it as a clip. You will lose credibility and, worse, you will mislead another collector.

Tooling Marks and Screwdriver Scars: Reading the Edge Like a Fingerprint

Tooling is where I spend most of my time with a loupe. Every tool leaves a signature. Once you learn to read it, you cannot unsee it.

A screwdriver used to pry a coin from a holder leaves a distinctive crescent-shaped gouge with a bright, polished bottom where the tip slipped. I have seen these on the edges of Morgan dollars and Eisenhower dollars more times than I can count, often mistaken for clips because the gouge removes a small curved segment. The difference is depth and displacement. A screwdriver gouge is deep in the middle and shallow at the ends, and it pushes metal up on one side. A genuine curved clip is uniform in depth and the metal is pushed outward, not up.

A file used to create a straight clip leaves multiple parallel lines running in one direction, with tiny metal filings still caught in the grooves under magnification. A Dremel tool, which I see more and more on modern coins, leaves a whirling, circular pattern and often burns the metal, leaving a darkened, discolored streak. None of these patterns occur at the Mint.

My Edge Examination Routine

1. Start with the naked eye under a single strong light source, rotating the coin slowly. A genuine clip will catch light evenly along its edge.
2. Move to 5x magnification. Look for smoothness and continuity of luster.
3. Move to 10x. Look for striations, burrs, and fresh metal.
4. Finally, check the opposite side. On a genuine clip, the obverse and reverse clips align perfectly — the planchet was missing metal on both sides. On PMD, the damage is usually only on one side, or the alignment is sloppy.

This alignment test is one of the most powerful tools I have. If you have a coin that is clipped on the obverse but perfectly round on the reverse, it is not a clipped planchet. It is damaged. The Mint cannot strike a coin that is clipped on one side only.

What the Forum Gets Right: Yes, Clipped Coins Really Do Come From the Mint

One of the most valuable lessons from that forum thread is that skepticism about Mint-issued errors is healthy, but cynicism is not. Collectors reported finding clipped coins in original Mint packaging again and again: in Mint Sets from the 1950s and 1960s, in Proof Sets, in Kennedy rolls with blank planchets, in Bicentennial sets from 1976, in GSA Hoard packaging for Morgan dollars, and in Eisenhower dollar blue packs and black-case Proofs.

I have verified many of these myself. The Mint’s quality control in the 1960s and 1970s was not what it is today. Planchet strips were fed quickly, packaging was done at high speed, and errors absolutely slipped through. The fact that a collector found a clipped nickel inside a 1968 Mint Set that also contained a packaging error — two combined cents — is not a coincidence. It tells us that particular set was assembled hastily, and multiple errors were more likely to escape together.

The same logic applies to the GSA Hoard. When the General Services Administration released thousands of Morgan dollars in the 1970s, they were random coins pulled from Treasury vaults, some dating back to the 1880s. It is entirely plausible that a curved-clip 1882-CC, a major off-center Morgan, or other errors were mixed in. Heritage Archives has documented a GSA Hoard 1882-CC curved clip in MS-63 Prooflike, and collectors have reported other GSA errors in original packaging. These are not modern fakes. They are historical artifacts of how the Mint and the Treasury handled coins.

Actionable takeaway: original packaging matters. A clipped coin in a sealed, original Mint Set or GSA holder carries far more credibility than a loose clipped coin with no provenance. When I attribute a coin for a client, I always ask: where did you get it, and was it in original packaging? The answer can be the difference between authentication and rejection.

Case Studies From the Thread: What They Teach Us About Attribution

Let me break down the specific finds from the thread, because each one illustrates a different attribution principle I use in my own practice.

The 1968 Set With a Clipped Nickel and Combined Cents

A collector won a 1968 Mint Set at a local club auction for $10. The auction sheet listed it as a packaging error. During viewing, he noticed two cents combined in one cell and, more importantly, a clipped nickel. A dozen other club members examined the set and missed the clip entirely. The club president, vice president, and treasurer were shocked when he pointed it out. This story teaches two lessons. First, genuine errors hide in plain sight, even in a room full of experienced collectors. Second, the combination of errors — packaging plus planchet — dramatically increases the likelihood that both are genuine, because they point to a single moment of Mint carelessness.

The Bicentennial Set and the Clipped Proof Cent

Another collector posted photos of a Bicentennial set with a clip, and a long-time error specialist confirmed he had a clipped 1976 proof cent in a third-party holder but not in Mint packaging. This is important. It shows that 1976 Bicentennial issues, struck in huge quantities for the celebration, absolutely contain planchet errors. The sheer mintage — hundreds of millions of coins — means that even a tiny error rate produces thousands of error coins. If you are cherry-picking Bicentennial sets, you are not wasting your time.

GSA Dollars and Eisenhower Dollars

The discussion of GSA clips and clipped Ike dollars in blue packs and black-case Proofs is equally instructive. Large dollars, with their large planchets, are especially prone to clips because the planchet is so wide that a small feeding error creates a visible missing segment. I have examined clipped Eisenhower dollars where the clip is subtle — just a few millimeters — but the rim distortion is unmistakable under magnification. The fact that these appear in original blue packs and black cases, which were sealed at the Mint, is powerful evidence of authenticity.

My Attribution Checklist: How I Decide in Hand

When a coin is placed in front of me and the owner asks, “Is this a clip or damage?” I run through the same checklist I have used for decades. I encourage you to use it too, whether you are buying at a show, bidding on an auction, or examining a new purchase.

• Check both sides for alignment: Clips align. Damage usually does not.
• Check the rim: Is the rim present, smooth, and pushed outward on the clipped edge? If yes, lean genuine. If the rim is missing, sharp, or rough, lean PMD.
• Check the luster and toning: Does the clipped edge match the rest of the coin in color and luster? Fresh metal is a deal-breaker.
• Check for tool marks: Parallel lines, circular Dremel marks, or screwdriver crescents mean PMD, every time.
• Check the design flow: Are the devices near the clip stretched and distorted as if metal flowed toward the edge? Or are they cut cleanly, as if a tool sliced through them?
• Check the provenance: Was it in original Mint packaging? Is there a pedigree, a holder, or documentation? Provenance does not prove an error, but it supports it.
• Check the rarity and price: If someone is asking $2,000 for a “rare lamination” on a common-date coin with no holder and no provenance, be skeptical. Genuine errors are priced by experts who have done this same checklist.

I also recommend building a reference library. Keep photos of confirmed clips and laminations from Heritage, PCGS, and NGC archives. Compare your coin’s edge to those images under the same magnification. In my experience, collectors who do this stop making expensive mistakes within a year.

Valuation, Collectibility, and Why This Matters

A genuine clipped planchet or lamination error transforms a common coin into a collectible rare variety. A clipped 1968 nickel in a Mint Set might bring $75 to $150 depending on the size of the clip and the grade. A major curved clip on a Morgan dollar from the GSA Hoard can bring thousands. A lamination on a high-grade proof can add a significant premium because proofs were supposed to be perfect. Conversely, a coin with PMD that masquerades as an error will typically sell for a discount, often 50% or more below the normal price for its grade, because collectors and dealers know it has been altered.

For investors, the lesson is clear: buy the attribution, not just the coin. A coin certified by PCGS or NGC as a clipped planchet, with the error on the label, is liquid and trustworthy. A raw coin described as “BU clip, nice lamination” in a listing with blurry photos is a gamble. I have watched too many collectors learn this the hard way.

For historians, these errors are even more valuable. A clipped coin in original 1976 Bicentennial packaging tells us about Mint production during a period of intense demand. A GSA Hoard clip tells us about Treasury storage and the random nature of the release. A blank Kennedy planchet in a Mint roll tells us about quality control failures that are part of American manufacturing history. These are not just coins. They are evidence. And when they show strong eye appeal and honest mint condition surfaces, their collectibility — and their numismatic value — soars.

Conclusion: Learn to Read the Metal, and the Errors Will Reveal Themselves

Is that a rare lamination flaw, or did someone just scratch it with a screwdriver? Now you know how to answer that question. A genuine planchet flaw was born before the strike, shaped by the dies, and aged with the coin. Post-mint damage happened after, shaped by a tool, an accident, or a cleaning, and it shows fresh metal, sharp burrs, and tool signatures that the Mint could never produce.

The collectors in that forum thread were right to celebrate their finds. Clipped coins do come from the Mint. They hide in Mint Sets, Proof Sets, GSA packaging, Bicentennial sets, and Eisenhower dollar cases. They hide at club auctions for $10, overlooked by a dozen experts. But they also taught us, indirectly, why attribution matters. Every genuine clip makes it harder for a fake to pass, and every fake makes it harder for a genuine clip to be believed.

I have examined, graded, and attributed these coins for years, and my advice has not changed: slow down, use magnification, check both sides, check the edge, check the toning, and respect the metal. If you do that, you will stop paying error prices for damaged coins, and you will start finding the real errors that everyone else missed. That is where the true joy of error collecting lives — not in the price guide, but in the moment you rotate a coin under the light and realize, with certainty, that the Mint made it that way.

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