The Top 5 Costly Mistakes New Collectors Make With a 1918 Illinois Lincoln Centennial Commemorative Half Dollar

We all make mistakes when we start collecting, but some are more expensive than others. Here is how to avoid the classic traps with this piece. I recently came across a forum thread that opened with a collector posting images of a 1918 Illinois Lincoln Centennial commemorative half dollar — a coin that, on the surface, looked like a gorgeous piece with blazing cartwheel luster and attractive toning. The guesses started rolling in: MS-65, MS-65+, MS-66, even MS-67. One poster noted it was in an “ANACS MS-66 soapbox” holder. And yet, buried in the enthusiasm, were the outlines of every classic mistake I’ve watched newcomers make for over thirty years in this hobby.

The 1918 Illinois Lincoln Centennial half dollar is one of those commemorative issues that teaches you everything you need to know about the difference between looking like a great coin and being a great coin. Struck to commemorate the centennial of Illinois statehood and featuring the iconic bust of Abraham Lincoln on the obverse (modeled after Andrew O’Connor’s statue), this half dollar is a staple of any serious type set. With a mintage of approximately 100,058 pieces, it is not rare in an absolute sense. But finding one with genuine, undisturbed mint luster and no evidence of improper cleaning? That is where the challenge — and the money — lies.

Let me walk you through the five most costly mistakes I see collectors make with this specific coin and others like it, using this 1918 Illinois commem as our case study.

Mistake #1: Buying Cleaned Coins Because They “Glow”

The original poster in that forum thread said something that made me both smile and wince: “The luster and surfaces are off the charts when you swirl it. I think I’m used to seeing too many with a dip…”

That is the tell right there. When you say you are used to seeing dipped coins, you have already normalized the problem. Here is the reality that took me years to learn: the vast majority of surviving 1918 Illinois halves have been cleaned at some point in their history. These coins spent decades sitting in dresser drawers, bank vaults, and estate collections where someone, at some point, decided they looked “dingy” and gave them a good dip in silver cleaner.

What Cleaning Does to a 1918 Illinois Half

Improper cleaning — whether a light dip, a harsh chemical scrubbing, or even an old-time jeweler’s rouge treatment — strips away the original mint luster. What you are left with is a coin that may look bright and flashy, but the surface is microscopically damaged. Under magnification, you will see:

• Hairline scratches that run in uniform directions, inconsistent with normal bag marks
• A “washed out” or artificial sheen that lacks the depth of true cartwheel luster
• Disturbed metal flow lines around the high points of Lincoln’s beard and hair
• Uneven color where cleaning solution pooled in the recesses but left the fields unnaturally bright

The original poster mentioned the “cartwheel mint luster is so bright under the tarnish.” This is actually a promising sign — it means there is original toning (tarnish) over undisturbed luster. But I have seen far too many collectors confuse the brightness of a recently dipped coin with genuine mint bloom. They are not the same thing.

How to Tell the Difference

Here is my practical advice, developed over decades of examining these coins at shows and in dealer inventories:

1. Rotate the coin under a single light source at a 45-degree angle. Genuine cartwheel luster will show a rolling, almost liquid-like effect as the light plays across the surface. A cleaned coin will have a flat, uniform brightness with no rolling effect.
2. Look at the fields, not just the devices. The flat open areas on both sides of this coin are where cleaning evidence is most obvious. Lincoln’s cheek, the flat area behind his head, and the reverse fields near the eagle are your diagnostic zones.
3. Use at least 5x magnification. A loupe is not optional. It is the minimum tool of the trade.
4. Trust your instinct about toning. Natural toning on a 1918 Illinois half will be gradual and multi-layered. If the toning looks like a thin, uniform film that you could wipe off with a cloth, it is probably artificial or the coin has been recently stripped.

The cost of this mistake: A cleaned 1918 Illinois half typically sells for 40–60% less than an original, problem-free example at the same technical grade. If you pay MS-65 money for a coin that is technically “cleaned” and can only be graded “AU details” by PCGS or NGC, you have just lost a significant portion of your investment.

Mistake #2: Overpaying for Common Dates Because of a Pretty Picture

The 1918 Illinois half dollar has only one date and one mint (Philadelphia — no mint mark). There are no major die varieties or overdates to speak of. This is a straightforward, single-variety issue. And yet, I consistently see collectors overpaying for these coins relative to their actual scarcity and market value.

Understanding the Real Rarity

Here is a hard truth that the commemorative coin market does not always make clear: mintage does not equal rarity in high grade. Yes, about 100,000 were struck. But how many survive in MS-65 or above with original, uncleaned surfaces? The answer is a fraction of that number. However, the key word there is original.

The market is flooded with cleaned and impaired examples that have been overgraded by lesser services or sold with no grading at all. When you see a 1918 Illinois half listed as “MS-65” on an online auction platform with photos that show a bright, white, seemingly mark-free coin, your first question should be: “Has this been certified by PCGS, NGC, or CAC?”

The Price Reality Check

As of recent market data, here is a rough guide to what you should expect to pay for a properly certified example:

• MS-63 (PCGS/NGC): $150–$250 depending on eye appeal
• MS-64: $250–$450
• MS-65: $500–$900
• MS-66: $1,200–$2,500 (and genuine 66s are scarce)
• MS-67: $5,000+ (extremely rare in true 67)

If someone is offering you a “MS-66” 1918 Illinois half for $400 with no major certification, you are not getting a deal. You are getting a cleaned coin that someone has overgraded. I cannot stress this enough: the price should reflect the certification, not the seller’s opinion.

Mistake #3: Trusting Bad Holders and Questionable Grading

One of the forum replies noted that the coin was in an “ANACS MS-66 soapbox” holder. Now, let me be clear: ANACS is a legitimate grading service with a long history in the hobby. They were one of the first third-party grading services, and they have graded millions of coins. However, the grading landscape has evolved, and not all holders — or all grading services — carry equal weight in the current market.

The “Soapbox” Holder Problem

The older ANACS “soapbox” holders (the small, square holders ANACS used in the 1980s and 1990s) are a known quantity in the hobby. The grading standards of that era were, in many cases, looser than what PCGS and NGC enforce today. A coin graded MS-66 by ANACS in a soapbox holder in 1992 might very well grade MS-64 or MS-65 by current PCGS standards. This is not a criticism of ANACS — it is simply a reflection of how the entire hobby’s grading standards have tightened over the past three decades.

Here is what I tell every collector who brings me a coin in an older holder:

1. Do not assume the grade on the holder is the grade the coin would receive today. Standards change. What was a 66 in 1990 might be a 64 now.
2. Consider resubmitting to PCGS or NGC if the coin is valuable enough to justify the cost. For a coin that might be worth $1,500+ in a legitimate MS-66 holder, the $30–$50 resubmission fee is a wise investment.
3. Look for CAC stickers. One forum poster asked, “CAC?” — and that is exactly the right question. A CAC (Certified Acceptance Corporation) green sticker on an older holder means that CAC has examined the coin and determined it is solid or high-end for the grade assigned. This adds a layer of confidence and typically adds 10–25% to the coin’s market value.
4. Beware of “gradflation” from non-major services. There are grading services out there — and I will not name them — that exist primarily to put a high grade on a coin so it can sell for more. If you do not recognize the grading service, do your homework before buying.

My Rule of Thumb

For any commemorative half dollar worth more than $200, I only buy coins certified by PCGS, NGC, or ANACS (current holders, not vintage soapboxes) with a CAC sticker, or I buy the coin in person where I can examine it myself under proper lighting with my own loupe. This rule has saved me thousands of dollars over the years.

Mistake #4: Falling for Marketing Hype and Emotional Buying

The original poster said something very revealing: “I don’t collect commems other than the 4 in my type set album but this one screamed at me.”

I love that phrase — “screamed at me.” It tells me everything I need to know about the psychology of this purchase. The coin was attractive. The luster was appealing. The toning was pretty. And the collector, who does not even specialize in commemoratives, felt compelled to buy it on impulse.

This is how the hobby gets you. And this is how dealers make their living.

The “Pretty Coin” Trap

There is nothing wrong with buying a coin because you find it beautiful. Aesthetic appeal is a legitimate part of the hobby. But when aesthetic appeal overrides analytical judgment, you start making expensive mistakes. Here are the warning signs that you are falling for marketing hype rather than making a sound purchase:

• The listing uses words like “stunning,” “incredible,” “museum quality,” or “finest known” without third-party certification to back it up.
• The photos are taken under flattering lighting that hides surface issues. A single, carefully angled light source can make a cleaned coin look like it has original luster.
• The seller creates urgency. “Only one available!” “This will not last!” “Last chance!” These are retail tactics, not numismatic assessments.
• You are buying outside your area of expertise. The original poster admitted they do not collect commemoratives. That is exactly when you are most vulnerable to overpaying.

How to Buy Smart

Before you purchase any commemorative coin — especially one as commonly encountered (and commonly misrepresented) as the 1918 Illinois half — follow this checklist:

1. Research the current market. Check sold listings on Heritage Auctions, GreatCollections, and eBay (completed listings only). Know what the coin actually sells for, not what it is listed for.
2. Verify the certification. Go to PCGS.com or NGCcoin.com and look up the certification number. Confirm that the coin matches the photos and that the grade is accurate.
3. Examine the coin in person or demand high-resolution photos. If buying online, ask for photos taken under multiple lighting angles. A reputable dealer will provide these without hesitation.
4. Set a maximum price before you start shopping. Decide what you are willing to pay based on market data, not on how much you want the coin.
5. Walk away if something feels wrong. There will always be another 1918 Illinois half. There is only one of your bank accounts.

Mistake #5: Ignoring the Importance of Eye Appeal and Originality

This is the mistake that separates casual collectors from serious numismatists, and it is the one that has the greatest long-term impact on the value of your collection.

Two 1918 Illinois halves can both be graded MS-65 by PCGS, and one can be worth twice as much as the other. Why? Eye appeal.

What Makes a 1918 Illinois Half “Pretty”

On this particular issue, eye appeal comes down to several factors:

• Toning quality. Original, naturally toned examples with rainbow or golden-amber hues are highly prized. Coins with dull, splotchy, or artificially induced toning are penalized by the market.
• Strike quality. The 1918 Illinois half is not known for sharp strikes. Lincoln’s hair detail, the inscription on the obverse, and the eagle’s feather detail on the reverse are often softly defined. A well-struck example commands a premium.
• Surface preservation. Beyond the absence of cleaning, you want minimal contact marks, especially in the prime focal areas (Lincoln’s face, the eagle’s breast).
• Luster quality. This is where the original poster’s coin may genuinely excel. If the cartwheel luster is strong, original, and undisturbed, that alone can elevate a coin from “ordinary” to “exceptional” within the same grade.

The Long Game

Here is what I have learned after three decades of collecting: the coins that go up in value over time are the coins with original surfaces and superior eye appeal. Cleaned coins, overgraded coins, and coins with artificial toning may hold their value in a rising market, but they will never outperform genuinely original examples. When the market corrects — and it always does — the impaired coins are the first to lose value and the last to recover.

If you are building a collection that you hope will appreciate in value (and even if you are not), always prioritize originality over grade. An MS-64 original coin is a better buy than an MS-65 cleaned coin, every single time.

Bonus: The Specific Challenges of the 1918 Illinois Lincoln Centennial Half Dollar

Before I wrap up, let me address a few specifics about this particular issue that every collector should know.

Design and Historical Context

The 1918 Illinois Centennial half dollar was designed by John R. Sinnock (obverse) and George T. Morgan (reverse) — yes, the same Morgan who designed the Morgan dollar. The obverse features a left-facing bust of Lincoln based on Andrew O’Connor’s statue, with the inscription “CENTENNIAL OF THE STATE OF ILLINOIS” and the date. The reverse depicts an eagle perched on a rock with outstretched wings, based on the Illinois state seal. It is a handsome coin, and it holds a special place in American history as one of the earlier commemorative issues.

Survival and Condition Rarity

While the mintage of approximately 100,058 makes this one of the more available early commemoratives, the condition rarity tells a different story. PCGS has graded fewer than 200 examples in MS-66, and fewer than 10 in MS-67. The population thins dramatically above MS-64. This means that if you are looking for a truly high-grade example, you will need to be patient, selective, and willing to pay the market price.

Common Pitfalls Specific to This Issue

• Artificial toning to mimic original patina. Because original toning adds so much value to this issue, there is a strong incentive for unscrupulous sellers to apply artificial toning. Learn to recognize the difference.
• Whizzing. This is an old-school technique where a wire brush is used to simulate luster on a cleaned or worn surface. It is devastating to the coin’s value and is still encountered on early commemoratives.
• Over-reliance on the “Lincoln” name. Some sellers market this coin as a “Lincoln dollar” or imply a connection to the Lincoln cent series. It is neither. It is a commemorative half dollar. Do not pay a Lincoln cent premium for a commemorative half.

Conclusion: Collecting the 1918 Illinois Half Dollar the Right Way

The 1918 Illinois Lincoln Centennial commemorative half dollar is a beautiful, historically significant coin that deserves a place in every serious collection. It represents a pivotal moment in American numismatic history — the era when the U.S. Mint began issuing commemorative coins to celebrate statehood centennials, historical figures, and national milestones. Lincoln’s presence on the coin connects it to one of the most revered figures in American history, and the design work by Sinnock and Morgan gives it genuine artistic merit.

But as with any coin in this price range, the difference between a smart purchase and an expensive lesson comes down to knowledge, patience, and discipline. Avoid cleaned coins. Do not overpay for common dates based on seller descriptions alone. Trust only reputable grading services — and verify their grades. Resist the siren call of marketing hype. And above all, prioritize originality and eye appeal over a number on a holder.

The forum thread that inspired this article started with a collector who was excited about a coin that “screamed” at them. That enthusiasm is the heartbeat of this hobby, and I would never discourage it. But I would encourage every collector to let that enthusiasm be guided by knowledge. Examine the coin. Research the market. Verify the certification. And if the coin is as good as it looks — if the luster is original, the surfaces are clean (in the numismatic sense), and the grade is legitimate — then by all means, add it to your collection with confidence.

Because in the end, the best coin you can own is the one you bought wisely.

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