Grading Funky Mint Mark – Opinions Requested: The Difference Between $10 and $1,000

Condition is everything. That’s the first lesson every serious collector learns, and it’s the lesson that separates the dreamers from the numismatists. As someone who has spent the better part of four decades peering through loupes and high-powered scopes, I can tell you that the gap between a $10 coin and a $1,000 specimen rarely comes down to luck—it comes down to a disciplined, systematic evaluation of what’s actually struck into the metal.

Not long ago, I stumbled across an online forum thread that perfectly illustrated this point. Titled “Funky Mint Mark – Opinions Requested,” it featured a self-described older gentleman with poor eyesight who had uploaded a blurry image of a 1979-P SBA dollar, wondering if he’d found a “P over, and to the right of, an S” mint mark. The responses ranged from genuinely helpful to outright dismissive, with one wag suggesting he “look up at Mars and squint.” But beneath the internet snark lies a valuable teaching moment about grading, variety attribution, and the chasm between a common coin and a certified rarity.

In this post, I’m going to walk you through how a professional grader approaches such a coin—not with wishful thinking, but with a methodical analysis of wear patterns, luster, strike quality, and eye appeal, all anchored in PCGS and NGC standards. We’ll break down why that “funky” mint mark is almost certainly not a world-changing error, and how you can apply the same grading discipline to your own collection. Because when it comes to coins, the difference between a common piece and a treasure is rarely about what you *want* to see—it’s about what’s genuinely there.

The Forum Question: What’s That Mint Mark?

The original post was straightforward enough: a cropped, pixelated image of the mint mark area on a 1979 SBA dollar. The poster asked, “Is this a P over, and to the right of, an S?” The responses were predictable—ask for better photos, ask for the coin type, and eventually someone pointed out that no “P over S” has ever been discovered for this issue. The poster later clarified it was a “wide rim 1979 SBA,” not in great condition, and that he was using a low-end microscope because he couldn’t see well without it.

Here’s the thing: I’ve handled more 1979-P SBA dollars than I can count. They’re common, they’re inexpensive, and they’re frequently the subject of “error” fantasies. The wide rim variety is real, yes, but it’s not a mint mark error. And a P-over-S? That would be a repunched mint mark (RPM) or an overpunch—where a die intended for one mint is re-struck with another. On a 1979-P, the mint mark is a “P” (Philadelphia used a P on SBA dollars, unlike most other coins). An “S” would be for San Francisco, and the idea that the Mint would punch an S over a P, or vice versa, on a coin meant for circulation is extraordinarily unlikely. But let’s not dismiss it out of hand. Instead, let’s apply the grader’s toolkit and see what the metal actually tells us.

Grading 101: The Four Pillars

When I sit down to grade a coin, I don’t start with the mint mark. I start with the fundamental attributes that determine whether a coin is a low-level collectible or a high-end gem. PCGS and NGC use the Sheldon scale (1 to 70), but the criteria break down into four pillars: wear, luster, strike, and eye appeal. Let’s examine each one in the context of this very coin.

Wear Patterns

Wear is the first thing I look for. On a 1979-P SBA dollar, the high points are the cheek of Liberty, the hair above the ear, the eagle’s wing tips, and the rim. A coin that has circulated will show a loss of detail on these raised areas. The forum poster admitted the coin was “not in the greatest condition.” That tells me we’re likely dealing with an AU (About Uncirculated) or lower MS (Mint State) coin at best. If the high points are worn smooth, the grade drops to XF (Extremely Fine) or even VF (Very Fine).

Key wear markers on an SBA dollar:

• Cheek and jawline: Smoothing here indicates circulation.
• Eagle’s breast and wing: Feather detail erodes quickly.
• Rim: A flat rim with no “step” suggests heavy wear.

For this coin, the wear pattern alone would likely put it in the lower circulated grades—nowhere near the $1,000 tier, regardless of what that mint mark looks like.

Luster

Luster is the “life” of a coin—the way light dances off the struck surfaces. On SBA dollars, the finish is typically satin-like, with a soft, even glow. Uncirculated coins retain full luster, while circulated coins show dull, broken cartwheel effects. The forum photos were too blurry to assess luster, but the poster’s description suggested the coin had been handled. If the luster is interrupted by hairlines or abrasions, that’s a red flag for a lower MS grade.

Remember: luster is the first thing to go when a coin is improperly stored or cleaned. A “funky” mint mark isn’t a substitute for original luster, and no amount of imagination can bring back what’s been lost to a careless thumb or a harsh cleaning.

Strike Quality

Strike quality refers to how well the design was impressed onto the planchet. Some SBA dollars have weak strikes, especially on the hair and the eagle’s tail feathers. A strong strike gives crisp details and sharp edges. The mint mark itself is part of the strike—if it’s a blob or an indistinct shape, it could be a weak strike, a filled die, or simply a bad image. In the forum, one member noted, “from the photo, I just see scattered blobs and some of them make the P.” That’s a classic sign of a strike-through, a die chip, or just out-of-focus photography.

As a grader, I’d examine the mint mark under 10x to 30x magnification. If the “P” appears as a distinct letter with sharp edges, it’s a normal mint mark. If it’s flat and mushy, it’s either a weak strike or a clogged die. Neither is a premium error. And here’s the hard truth: even a genuine RPM on a common date like this one wouldn’t necessarily send the value soaring unless it was a major, widely recognized variety.

Eye Appeal

Eye appeal is the hardest criterion to quantify, but every grader knows it when they see it. It’s the overall visual “pop” of a coin—clean surfaces, pleasing toning, and no distracting marks. A coin with a giant blob next to the mint mark, or a suspicious mark that looks like a misplaced letter, loses eye appeal. In this case, the “P over S” is likely just a die chip or a polish mark. On a low-grade common date, that’s a detractor, not a premium. It breaks my heart to say it, but I’ve seen too many collectors fall in love with a coin’s story rather than its actual condition.

Applying the Standards: The 1979-P SBA Dollar

Now let’s get specific. The 1979-P SBA dollar comes in two major varieties: the “wide rim” (also called “near date”) and the “narrow rim” (far date). The wide rim is actually the more common of the two, though it’s still a collectible in high grades. The coin in the forum is a wide rim, which is good—it means it’s a legitimate variety, but not rare. The numismatic value for a typical circulated example is $2 to $5. Even in MS65, it’s a $20 coin. So where does the $1,000 figure come from? Only if the coin were a previously unknown major error—like a P over S mint mark—and even then, it would need to be certified and in high mint state to command that kind of premium.

Identifying the Coin Correctly

The poster was right about one thing: it’s a 1979-P SBA. The “P” mint mark is on the obverse, left of the date. The wide rim variety has a broader, flatter rim with a more pronounced “denticle” detail. But the mint mark itself? On a normal 1979-P, the “P” is a clean, solid letter. If there’s an “S” hidden beneath it, that would require a repunched die. Let me tell you—in all my years, I’ve never seen one, and neither has any attribution service. The PCGS and NGC variety databases list dozens of repunched mint marks for other coins, but not for 1979-P SBA dollars. The poster’s “P over S” is almost certainly a die chip, a filled die, or a lighting artifact from a poor photo.

The Mint Mark Anomaly: P Over S or Not?

Let’s analyze the image as a grader would. The original photo showed a blurry blob that could be a “P.” The poster said it looked like a “P over, and to the right of, an S.” But when another member super-zoomed the image, it became pixelated mush. That’s the problem with relying on low-resolution images. In my own experience, when I encounter a mint mark that looks doubled or repunched, I ask two questions:

1. Is the secondary image clearly defined, or is it just a shadow?
2. Does the secondary image have the same shape and size as the primary, or is it a random chip?

In this case, the “S” was likely just the loop of the “P” being read incorrectly, or a die chip in the field. A true repunched mint mark shows a clear, overlapping outline of the same letter, not a different letter entirely. The provenance of this coin—a common date found in circulation—further argues against a major variety. Major errors don’t hide in pocket change; they get noticed, set aside, and certified.

The Importance of Proper Imaging

If you’re going to submit a coin for grading or variety attribution, you need proper images. The forum’s advice to the OP was spot-on: invest in a decent macro lens or a USB microscope. But even then, some mint marks require a 30x loupe or a digital scope with good lighting. The worst thing you can do is rely on a smartphone photo and a prayer. As a grader, I see this all the time—collectors convincing themselves they’ve found a $5,000 error based on a blurry photo. My advice: if you can’t see it with your own eyes under magnification, it’s not there. And if you can’t describe what you’re seeing without using the word “funky,” you probably need to look again.

PCGS/NGC Standards: How a Professional Grader Thinks

When a coin crosses my desk, I don’t just look at the mint mark. I look at the whole package. PCGS and NGC graders use a “market grading” approach that considers the four pillars plus a fifth, unwritten factor: market acceptance. A coin with a recognized error or variety may receive a “V” (variety) designation, but that doesn’t automatically raise the grade. In fact, a heavily circulated coin with a dramatic error might still be only a VF grade. The error adds a premium, but only if it’s genuine and attributable. And here’s the kicker: the market accepts certified varieties with clear, documented diagnostics. It does not accept blurry photos and hopeful speculation.

The Sheldon Scale and Mint Marks

On the Sheldon scale, a 1979-P SBA in MS65 is a common coin. In MS67, it’s a semi-key date, but still not a big-ticket item. The market premium for a “wide rim” variety is modest. A P-over-S would be a major discovery, but it would need to be certified by PCGS or NGC to command any real money. The cost of certification ($30 to $50) would exceed the coin’s value unless the variety is confirmed. That’s why I always tell collectors: don’t spend money on authentication unless you’re confident you have something rare. And if you’re not confident, learn why before you spend.

Why This Coin Isn’t a Rarity

Let’s look at the facts: The 1979-P SBA dollar had a mintage of over 360 million pieces. It’s a common date. The wide rim variety is one of two known die varieties, but it’s not rare. The mint mark is a simple “P” with no known repunching. The coin in question is circulated, with likely surface issues. Even if the mint mark were an RPM, it would be a minor variety, not a major one. The difference between $10 and $1,000 is the difference between a common coin and a certified, high-grade, widely recognized variety. This coin is neither. And that’s okay—not every coin needs to be a jackpot. Some coins are just teachers in disguise.

Common Mint Mark Anomalies vs. Recognized Varieties

To help you avoid the same trap, let’s review the most common mint mark anomalies you might encounter, and how to tell them apart from genuine varieties. These are the kinds of details that separate a knowledgeable collector from someone who just squints at every shiny thing they find.

Die Chips and Filled Dies

A die chip is a small piece of metal that breaks away from the die, leaving a raised bump on the coin. A filled die is when a foreign object clogs the die, leaving a missing or blurred design element. Both are common and generally low-value. The “P over S” in the forum could easily be a die chip adjacent to the mint mark. I’ve seen this exact scenario play out a hundred times—a collector spots a bump, convinces themselves it’s a letter, and spends weeks chasing a shadow. If you’re going to collect errors, learn to identify the common ones first. Die chips are everywhere. Genuine repunched mint marks are not.

Repunched Mint Marks (RPMs)

An RPM occurs when a mint mark is punched into a die more than once, creating a doubled or overlapping effect. These are collectible and can be valuable on key dates. To identify an RPM, you need to see clear separation between the two punch marks. A true RPM will show a distinct outline of the same letter, not a different letter entirely. If you see a “P” and an “S” overlapping, that’s not an RPM—that’s an overpunch, which is a different (and rarer) thing. On a 1979-P SBA, no such overpunch has ever been documented. And trust me, if it existed, we’d all know about it. The error collecting community is vast, connected, and incredibly detail-oriented. If you think you’ve found something new, do your homework before you post.

The BIE Die Chip: A Better Starting Point

One of the forum members wisely suggested that the OP focus on BIE die chips—a specific type of die chip found on Lincoln cents between the “B” and “E” of “LIBERTY.” The OP had previously found one, which shows he has a good eye. That’s the right way to collect errors: start with a known, documented variety, and learn its ins and outs. BIE chips are affordable, fun to hunt, and can be found in circulation. They’re also a great way to develop your grading skills without the pressure of a potential fortune on the line. Start small, learn the diagnostics, and build your foundation. That’s how the pros do it.

Actionable Takeaways for Collectors

Whether you’re a seasoned numismatist or a beginner with a microscope, here are my top tips for avoiding the “funky mint mark” trap. These are the lessons I wish someone had drilled into my head when I first started collecting decades ago.

For Buyers

• Buy the coin, not the story. If a seller tells you a mint mark is a rare error, ask for PCGS/NGC certification. If it’s not certified, assume it’s not a variety. The story is just packaging; the coin is the product.
• Invest in a good loupe. A 10x triplet loupe is the standard. Don’t rely on a microscope unless it has a high-resolution camera and a stand. Your eyes are your most valuable tool—treat them accordingly.
• Learn the known varieties. Check the PCGS VarietyVista or NGC VarietyPlus databases before getting excited about an anomaly. Nine times out of ten, what you’ve found is already documented. The tenth time is when you might have something special.

For Sellers

• Be honest about condition. A coin with a damaged mint mark is not an error. If you’re unsure, submit it for attribution. Honesty isn’t just good ethics—it’s good business. Word travels fast in this community.
• Don’t grade from memory. Use a grading guide or send it to a third-party service. A “funky” mint mark doesn’t make a coin valuable if it’s scratched and worn. And if you’re selling to collectors who know better, they’ll spot the overpricing faster than you can say “rare variety.”

For Hobbyists

• Practice on common coins. Buy a roll of 1979-P SBA dollars and examine every mint mark. You’ll quickly learn what a normal “P” looks like. That hands-on experience is worth more than any book.
• Join a coin club. There’s no substitute for experienced eyes. The forum members who poked fun at the OP were harsh, but they were right about the need for better images and knowledge. Surround yourself with people who know more than you do.
• Focus on a niche. As the BIE suggestion shows, finding a specific error type and studying it is more rewarding than randomly searching for “something weird.” Specialization builds expertise, and expertise builds confidence.

Conclusion: The Real Treasure Is Knowledge

So, what’s the verdict on that “funky” mint mark? It’s a 1979-P SBA dollar with a likely die chip or a trick of the light. It’s not a P over S, it’s not a major error, and it’s worth about $10 in that condition. But the forum thread wasn’t a waste of time—it was a lesson in grading fundamentals. Condition is everything, and the true grade of this piece is determined not by an imagined mint mark, but by the wear on its high points, the luster in its fields, the quality of its strike, and its overall eye appeal.

As a professional grader, I’ve seen this scenario hundreds of times. A collector becomes convinced they’ve found a jackpot, only to be disappointed by the reality. But that disappointment is the beginning of true numismatic education. The collectors who succeed are the ones who learn to separate fact from fantasy, who study the standards, and who understand that the real treasure isn’t a mispunched mint mark—it’s the knowledge to recognize one. So the next time you’re peering at a coin through a lens, remember: ask not what the mint mark *could* be. Ask what it *is*. And if you can’t tell, put it aside and learn. The coins will always be there, but the wisdom to grade them accurately is the only premium that never depreciates.

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