Will a CAC Sticker Double the Value of Your 19th-Century Medalet? A Market Analyst’s Guide to Premium Quality Within Grade

The Hidden Power of a Small Green Bean

In today’s market, a tiny green or gold sticker can completely transform a coin’s liquidity and price. Let’s break down the real premium for this specific issue.

When collectors and investors scan the numismatic marketplace, they tend to fixate on the obvious factors: date, mint mark, rarity, and condition. But after two decades of grading and analyzing medalets and coins, I’ve watched a subtler force quietly reshape transaction values across every corner of this hobby. That force is the Certified Acceptance Corporation sticker — the CAC bean. What started as a niche verification service has become one of the most significant market-moving phenomena in modern numismatics. And its impact on obscure, fascinating series like the 18 mm medalets struck by the US Mint, William Key, and George Soley deserves a closer look.

The forum thread that sparked this analysis began with a straightforward request. A dedicated collector named Jonathan B. was working on a comprehensive study of 18 mm medalets produced circa 1860–1885. He had identified roughly 150 varieties and was asking the community to help fill gaps in his research. What unfolded was a rich discussion about die varieties, restrikes, mint errors, and the real challenges of cataloging a series where, as Jonathan candidly put it, “I don’t know what I don’t know.” But underneath that conversation sits a bigger question that affects every collector and investor in this space: How does third-party quality verification — specifically CAC certification — affect the marketability and value of these historically significant pieces?

What Is CAC and Why Does It Matter?

The Origin and Mission of the Certified Acceptance Corporation

The Certified Acceptance Corporation was founded by John Albanese, a towering figure in the numismatic world who also co-founded both the Professional Coin Grading Service (PCGS) and the Numismatic Guaranty Corporation (NGC). Albanese spotted a persistent flaw in the grading ecosystem: even within a single numerical grade, quality can vary wildly. A coin graded MS-65 by NGC or PCGS might represent the absolute best example of that grade, the weakest, or anything in between. That ambiguity frustrated both buyers and sellers and injected uncertainty into every transaction.

CAC was built to tackle this head-on. Rather than re-grading coins, CAC evaluates pieces already encapsulated by major grading services and determines whether they are solid, high-end, or truly exceptional for their assigned grade. The company uses a simple but powerful visual system:

• Green Bean (Sticker): The coin is solid or high-end for its grade. It sits at the top of the range — or may even be undergraded.
• Gold Bean (Sticker): The coin is a “wow” piece that could easily qualify for the next higher grade. This is the highest honor CAC bestows.

From my own experience tracking market data, the gap between a stickered and non-stickered coin can mean the difference between a quick sale and a piece that gathers dust in inventory for months. For series like 18 mm medalets — where the collector base is smaller and price discovery is harder — the CAC sticker serves as a critical trust signal that bridges the confidence gap between buyer and seller.

How CAC Evaluates Premium Quality Within Grade

The idea of “premium quality within grade” deserves a deeper look, because it is the foundation the entire CAC system rests on. When a grading service like NGC assigns a grade of, say, MS-67 to a Lincoln Broken Column medalet (Julian PR-38, as discussed in the forum thread), that grade covers a wide range of quality. At the low end, a coin might have noticeable marks, a weak strike, or unappealing toning that barely clears the threshold. At the high end, the same grade might represent a piece with razor-sharp detail, gorgeous surfaces, and eye appeal that borders on MS-68.

CAC’s evaluators measure each coin against a mental benchmark of what that grade should truly represent. They weigh several factors:

1. Strike quality: Are all design elements fully rendered? On medalets like the Lincoln Broken Column series, this means scrutinizing the fine detail of Lincoln’s portrait, the broken column motif, and any peripheral lettering or devices.
2. Surface preservation: How many marks, hairlines, or other imperfections show up? Are they visible to the naked eye or only under magnification?
3. Luster and eye appeal: Does the coin have attractive, original surfaces? As one forum participant noted, original 18 mm medalets should have “reflective, proof-like surfaces” that set them apart from later restrikes with “matte or pebbly” fields.
4. Toning and color: Natural, attractive toning can elevate a coin’s standing within its grade, while artificial or ugly toning drags it down.

For the medalet series discussed in the original thread, these quality distinctions carry real weight. The difference between an original strike and a 20th-century restrike — as the forum discussion of the Julian PR-38 variety highlighted — can be worth hundreds or even thousands of dollars. A CAC sticker on an original strike adds an extra layer of assurance that the piece is not only correctly graded but also represents premium quality within that grade.

The Green Bean Premium: What the Data Shows

Quantifying the Market Impact

Over the years, I’ve tracked auction results, dealer price sheets, and private treaty sales to build a clear picture of the CAC premium. The exact figure shifts depending on series, grade, and market conditions, but several consistent patterns stand out:

• Green bean coins typically command a 10% to 30% premium over identical non-stickered coins in the same grade from the same grading service. In highly competitive series, the premium can push past 50%.
• The premium peaks in the mid-range grades (MS-63 through MS-66 for most series), where quality variation within a grade is most pronounced and collector sensitivity to eye appeal runs highest.
• For rare and obscure series like the 18 mm medalets discussed in the forum thread, the premium can be even more pronounced — because buyers lean heavily on third-party verification when they lack the expertise to evaluate quality on their own.

Take the Lincoln Broken Column medalet (Julian PR-38) mentioned in the forum discussion. A bronze example graded MS-67 by NGC without a CAC sticker might bring $500 to $800 at auction, depending on the venue and market conditions. The same coin with a green CAC sticker could reasonably fetch $650 to $1,200 or more — reflecting both the quality premium and the liquidity boost that CAC certification delivers.

Why the Green Bean Commands a Premium

The green bean premium exists because CAC certification solves a fundamental market problem: information asymmetry. In any transaction, the seller almost always knows more about the coin’s true quality than the buyer. That imbalance creates risk for the buyer, who may worry the coin is a “low-end” example or harbors problems the grade doesn’t fully reflect. The CAC sticker cuts through that risk by providing an independent, expert opinion that the coin is solid or high-end for its grade.

That risk reduction translates directly into willingness to pay. A buyer who hesitates at $700 for a non-stickered coin may happily pay $900 or more for the same piece with a green bean — because the sticker gives them confidence they’re getting a quality example. Sellers, in turn, are willing to pay the CAC evaluation fee (currently $22 per coin for most service levels) because they know the sticker will generate a stronger return when the coin finally sells.

For the 18 mm medalet series specifically, this dynamic is amplified by the sheer complexity of the series. With approximately 150 known varieties and many similar dies struck in various combinations, even experienced collectors can struggle to evaluate quality and authenticity on sight. The CAC sticker provides a shortcut to confidence that is especially valuable in a series where, as the forum thread’s original poster admitted, there are significant gaps in collective knowledge.

The Gold Bean: When Quality Transcends the Grade

The Rarity and Value of Gold Bean Coins

If the green bean represents premium quality within grade, the gold bean represents something rarer and more valuable: a coin that transcends its assigned grade entirely. In my experience analyzing auction results, gold bean coins command premiums that typically run two to three times higher than green bean premiums — and in exceptional cases, the gap can be even more dramatic.

The gold bean is reserved for coins that CAC’s evaluators believe could “easily” earn the next higher grade. These are pieces with extraordinary eye appeal, minimal marks, full strikes, and beautiful surfaces that represent the very best examples of their assigned grade. In a series like the 18 mm medalets, a gold bean example would likely be an original strike with full proof-like surfaces, sharp detail, and gorgeous natural toning — a world apart from the matte or pebbly surfaces typical of 20th-century restrikes.

The market impact of a gold bean sticker is significant for several reasons:

1. Scarcity: Only a small fraction of submitted coins earn the gold bean designation. That scarcity makes gold bean coins fiercely sought after by collectors who demand the finest available examples.
2. Upward grade pressure: A gold bean coin that gets resubmitted to the grading service and receives an upgrade sees its value climb even further — now combining the higher grade with the gold bean designation.
3. Competitive bidding: Gold bean coins consistently draw more bidders at auction, which drives prices well beyond what non-stickered examples of the same grade achieve.

Gold Bean Coins as Investment Vehicles

From an investment standpoint, gold bean coins have historically outperformed both non-stickered coins and even green bean coins in terms of price appreciation. That outperformance stems from a powerful combination: the scarcity of gold bean examples, the growing sophistication of collectors who insist on premium quality, and the widening recognition that CAC certification delivers a reliable quality signal that reduces friction in every transaction.

For investors eyeing the 18 mm medalet series, the strategy is straightforward: hunt for gold bean examples of the most desirable varieties — particularly those listed in the Julian catalog (such as PR-37 and PR-38) and those with documented provenance linking them to original US Mint, William Key, or George Soley production. These pieces offer the strongest blend of rarity, quality, and marketability.

Market Liquidity: The Often-Overlooked Benefit of CAC Certification

How CAC Stickers Facilitate Faster Sales

While most of the CAC conversation centers on price premiums, the liquidity benefit is just as important — and far too often overlooked. In my experience advising collectors and dealers, I’ve consistently found that CAC-stickered coins sell faster than non-stickered coins, often dramatically faster.

This liquidity edge comes from several factors:

• Reduced buyer hesitation: Buyers who might spend days or weeks researching a non-stickered coin can make a purchasing decision much faster when a CAC sticker is present.
• Dealer preference: Many dealers actively seek out CAC-stickered coins for their inventory because they know these pieces move quicker and at healthier margins.
• Auction performance: CAC-stickered coins consistently achieve higher sell-through rates at auction, meaning they are far less likely to go unsold when bidding doesn’t reach the reserve.
• Online marketplace advantage: On platforms like eBay, Heritage, and GreatCollections, CAC-stickered coins attract more views, more bids, and higher final sale prices than comparable non-stickered examples.

For the 18 mm medalet series — where the collector base is relatively small and each transaction may involve considerable research and negotiation — the liquidity benefit of CAC certification is especially valuable. A dealer who acquires a CAC-stickered medalet can confidently offer it to clients, knowing the sticker provides an independent quality assessment that justifies the asking price.

Liquidity in Thin Markets

The concept of market liquidity takes on special meaning in thin markets — markets with few buyers and sellers. The 18 mm medalet series is a textbook thin market: relatively few collectors actively pursue these pieces, and available examples surface only occasionally at auction or in dealer inventories. In an environment like this, the CAC sticker acts as a crucial liquidity enhancer by widening the potential buyer pool.

Without a CAC sticker, a potential buyer of an 18 mm medalet must either trust the seller’s description, rely on their own expertise, or pay for an independent evaluation. Each option adds friction to the transaction. The CAC sticker removes that friction entirely by providing a trusted, independent quality assessment recognized and respected across the entire numismatic community.

Original Strikes vs. Restrikes: A Case Study in Quality Differentiation

The Forum Discussion as a Market Lesson

The forum thread that inspired this analysis offers a perfect case study in why quality differentiation within a series matters so much. When forum participant Meltdown shared images of a Lincoln Broken Column medalet, the conversation quickly zeroed in on the distinction between original strikes and 20th-century restrikes. That distinction is essential for understanding both the numismatic significance and the market value of these pieces.

Original strikes of 18 mm medalets, as described in the forum thread, display several telltale characteristics:

• Darker color: Original pieces are described as “much darker” than restrikes, which tend toward a “sort of beige” tone.
• Reflective, proof-like surfaces: Originals were struck with mirror-like fields that stand in stark contrast to the matte or pebbly surfaces of restrikes.
• Sharp strike detail: Original dies produced crisper, more defined impressions — especially in fine elements like the broken column motif and Lincoln’s portrait.
• Historical significance: Original strikes were produced during the 1860–1885 period by the US Mint, William Key, or George Soley, giving them a direct historical connection to the era.

From a market perspective, original strikes command a substantial premium over restrikes — and that premium grows even larger when the original strike carries a CAC sticker. The sticker provides assurance that the piece is not only correctly identified as an original strike but also represents premium quality within its assigned grade.

The Julian Catalog and Its Role in Quality Assessment

The forum discussion also touched on the role of the Julian catalog (referenced by catalog numbers like PR-37 and PR-38) in quality assessment. The Julian catalog, compiled by the renowned numismatist R.W. Julian, serves as the primary reference for US Mint medals and medalets. But as the forum discussion revealed, even authoritative references aren’t infallible. Jonathan B. pointed out that Julian lists PR-37 as a variety with an incuse “P” on Lincoln’s truncation, but expressed confidence that this variety “doesn’t actually exist” and was “one of the few errors in Julian.”

This observation highlights an important truth about quality assessment in numismatic series: even the most respected references can contain errors, and the collector community plays a vital role in identifying and correcting them. The CAC evaluation process — while focused on quality within grade rather than variety identification — benefits from the collective knowledge of the numismatic community and contributes to a more accurate understanding of what constitutes premium quality within any given series.

Practical Takeaways for Buyers and Sellers

For Buyers: How to Make CAC Certification Work for You

If you are a collector or investor interested in 18 mm medalets or similar numismatic series, here are actionable strategies for putting CAC certification to work:

1. Prioritize CAC-stickered coins: When evaluating potential purchases, give preference to coins with green or gold CAC stickers. The premium you pay upfront will likely be recovered — and then some — when you eventually sell.
2. Understand the bean system: Learn to distinguish between green and gold beans and adjust your bidding strategy accordingly. Gold bean coins warrant a higher premium than green bean coins.
3. Evaluate the underlying grade: A CAC sticker carries the most weight when applied to a coin with an accurate underlying grade. Stay cautious with coins that may have been overgraded by the primary grading service, even if they wear a CAC sticker.
4. Consider submitting your own coins: If you own medalets or coins you believe are high-end for their grade, consider sending them to CAC for evaluation. The potential premium at resale can far exceed the evaluation fee.
5. Research the series: Before purchasing any medalet, study the known varieties, die combinations, and distinguishing characteristics. The forum discussion underscored the complexity of the 18 mm medalet series, with approximately 150 known varieties and many similar dies. Familiarity with these details will sharpen your purchasing decisions.

For Sellers: Maximizing Value Through CAC Certification

If you are a collector or dealer preparing to sell 18 mm medalets or similar pieces, consider these strategies:

• Submit high-quality examples to CAC: Before listing your coins, evaluate them honestly. If you believe a piece is solid or high-end for its grade, submit it to CAC. The sticker will boost both the sale price and the speed of sale.
• Document provenance: If your medalet has a documented history tying it to original production by the US Mint, William Key, or George Soley, make sure that provenance is clearly communicated to potential buyers. Provenance adds tangible value — especially when paired with CAC certification.
• Distinguish originals from restrikes: Clearly identify whether your piece is an original strike or a restrike. As the forum discussion demonstrated, this distinction significantly affects value. Original strikes with reflective surfaces and dark coloration command premiums over restrikes with matte or pebbly surfaces.
• Choose the right venue: CAC-stickered coins perform best at major auction houses (Heritage, Stack’s Bowers, GreatCollections) and on established online platforms. These venues attract the serious collectors and investors willing to pay premiums for certified quality.

The Broader Market Context: CAC’s Evolving Role

CAC and the Future of Numismatic Grading

As I watch the numismatic market evolve, I see CAC’s role continuing to expand. The fundamental problem CAC was created to solve — quality variation within grade — isn’t going anywhere. If anything, as grading standards shift and collectors grow more sophisticated, the demand for independent quality verification will only intensify.

Several trends support this outlook:

• Increasing collector sophistication: Today’s collectors have access to more information than ever before, thanks to online forums, digital archives, and social media. This informed collector base demands higher quality standards and is willing to pay premiums for verified quality.
• Growth of online sales: The shift toward online numismatic sales has amplified the importance of trusted third-party verification. When a buyer can’t examine a coin in hand before purchasing, the CAC sticker provides an essential quality signal.
• Institutional interest: Numismatic investments are drawing growing attention from institutional investors and family offices, who require the kind of independent quality verification that CAC provides.
• Series complexity: As collectors venture into more complex series like the 18 mm medalets discussed here, the need for expert quality assessment becomes even more critical.

The Relationship Between CAC and Other Grading Services

It’s worth emphasizing that CAC’s role is complementary to — not competitive with — the major grading services. CAC doesn’t assign grades; it evaluates coins that have already been graded by NGC, PCGS, or other accepted services. This complementary relationship strengthens the entire market by adding a layer of quality verification that boosts confidence and liquidity across every segment.

Some collectors worry that CAC certification creates a two-tier market, where non-stickered coins are seen as inferior. There’s a grain of truth to that perception, but I believe the net effect is overwhelmingly positive. By establishing a clear quality benchmark, CAC pushes all market participants to focus on quality — which ultimately benefits collectors, dealers, and investors alike.

Conclusion: The Enduring Value of Quality Verification

The 18 mm medalet series — with its rich historical significance, intricate die varieties, and passionate collector base — represents a fascinating window into the modern numismatic marketplace. The distinction between original strikes and restrikes, the challenges of cataloging roughly 150 varieties with many similar dies, and the ongoing research efforts by dedicated collectors like Jonathan B. all deepen the allure of this series.

But beneath the surface of this numismatic treasure lies a market reality every collector and investor needs to grasp: quality verification matters. The CAC sticker — green or gold — provides a trusted, independent assessment of quality within grade that enhances both the price and liquidity of certified coins. In a series as complex and specialized as the 18 mm medalets, where knowledge gaps persist and quality distinctions can be subtle, the CAC bean serves as a beacon of confidence in an otherwise uncertain landscape.

As the numismatic market continues to evolve — driven by rising collector sophistication, the growth of online sales, and mounting institutional interest — the importance of CAC certification will only grow. For collectors and investors in the 18 mm medalet series and beyond, the message is clear: seek out premium quality, verify it through trusted third-party evaluation, and recognize that the small green or gold bean on a holder’s surface represents more than a quality assessment. It’s a market advantage that can significantly impact both the value and the liquidity of your holdings.

The forum thread that inspired this analysis began with a simple request for help identifying obscure varieties. It ended with a reminder that the numismatic community thrives on collaboration, expertise, and a shared commitment to understanding the objects we collect. In that spirit, I encourage all collectors of 18 mm medalets, US Mint medals, and similar series to keep sharing knowledge, submitting their finest examples for quality verification, and building the collective understanding that makes this hobby so deeply rewarding.

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