Is Your 1928 Peace Dollar Real? How to Spot a Fake Mint Mark

Introduction: The Counterfeit Crisis in Peace Dollar Collecting

With counterfeiters flooding the market, knowing the specific diagnostic points for this coin is critical. The 1928-P Peace Dollar represents one of the most heavily targeted coins for alteration, particularly from the more common 1928-S variety. As collectors and investors navigate this challenging market, understanding the authentication process becomes essential for protecting both your collection and your investment.

Historical Context: The 1928 Peace Dollar Series

The 1928 Peace Dollar was minted during a brief period when the denomination was produced after a hiatus from 1923 to 1927. Philadelphia struck 360,649 pieces while San Francisco produced 1,632,000. The significant rarity difference between these two mints makes the 1928-P particularly valuable, creating strong incentive for fraudulent alterations.

Metal Composition and Specifications

Both the 1928-P and 1928-S Peace Dollars share identical specifications:

• Composition: 90% silver, 10% copper
• Weight: 26.73 grams (0.859 troy ounces)
• Diameter: 38.1 mm
• Edge: Reeded

Weight and Magnetic Properties Testing

Weight verification serves as the first line of defense against counterfeit Peace Dollars. A genuine 1928 Peace Dollar must weigh precisely 26.73 grams, with minimal tolerance for wear on circulated examples.

Weight Testing Protocol

Using a precision digital scale calibrated to 0.01 grams, verify the coin’s weight. Any deviation beyond 0.1 grams from the standard weight should raise immediate suspicion. Counterfeiters often fail to replicate the exact silver content, resulting in weight discrepancies.

Magnetic Properties

Since genuine Peace Dollars contain 90% silver and 10% copper, they should exhibit no magnetic attraction. Any magnetic response indicates a counterfeit, as silver and copper are non-ferrous metals. This simple test can quickly eliminate many fakes before proceeding to more detailed examination.

Die Markers and Design Details

The 1928 Peace Dollar exhibits several distinctive die characteristics that serve as authentication markers. Understanding these features helps identify genuine specimens and spot alterations.

Obverse Design Elements

The obverse features Lady Liberty’s profile with specific hair detail patterns. The 1928 dies show particular characteristics in the hair strands above the forehead and around the tiara. Any disruption in these natural flow lines suggests tooling or alteration work.

Reverse Design and Ray Patterns

The reverse displays the iconic eagle perched on a rock with radiating rays. The 1928 dies show specific ray patterns, particularly around the eagle’s wings. Forum members noted that “the partial missing ray is also a ‘tell’ of an altered coin,” highlighting how damage to these design elements can indicate tampering.

Mint Mark Examination

The critical authentication point for distinguishing between 1928-P and 1928-S varieties lies in the mint mark location and characteristics. The Philadelphia mint produced no mint mark, while San Francisco pieces bear an “S” below the wreath on the reverse.

Common Alteration Techniques and Detection

Based on the forum discussion, several alteration techniques were identified as common threats to collectors.

Mint Mark Removal

The most prevalent alteration involves removing the “S” mint mark from a 1928-S to create a fake 1928-P. This technique leaves several telltale signs:

• Surface disturbance in the mint mark area
• Staining or discoloration where the mint mark was removed
• Odd marks or tooling evidence in the removal area
• “Conveniently placed distortion” as one forum member observed

Surface Cleaning and Tooling

Counterfeiters often employ harsh cleaning techniques to disguise alteration work. This creates additional authentication challenges:

• Over-polished surfaces that lack natural luster
• Tool marks visible under magnification
• Artificially bright or unnaturally smooth areas

Advanced Authentication Methods

While basic weight and magnetic testing provide initial screening, advanced authentication requires closer examination and specialized tools.

Magnification and Die Analysis

Using 10x to 20x magnification, examine the coin’s surface for die characteristics and alteration evidence. Pay particular attention to:

• Die polish lines and their consistency
• Metal flow patterns around design elements
• Any signs of re-engraving or tooling

Die Pair Verification

Forum members referenced VAMWorld, which catalogs all known die pairs for Peace Dollars. The 1928-P has specific die pairs that can be matched against known genuine examples. Any coin showing characteristics inconsistent with documented die pairs should be viewed with suspicion.

Surface Analysis Techniques

Professional authentication often employs specialized equipment:

• Microscope examination for surface anomalies
• Specific gravity testing to verify silver content
• X-ray fluorescence (XRF) analysis for metal composition

Professional Authentication Options

When dealing with potentially valuable coins, professional authentication provides the highest level of certainty.

Third-Party Grading Services

Services like PCGS and NGC offer authentication and grading. However, forum members cautioned that “even if this were TPG-authenticated as a P, they’ve been known to make mistakes and it will always be a problem coin.” This highlights the importance of understanding that authentication is probabilistic, not absolute.

Expert Consultation

Consulting with Peace Dollar specialists can provide additional authentication perspectives. Experts familiar with die characteristics, wear patterns, and common alterations offer valuable insights beyond standard authentication services.

Case Study: The Altered 1928-S Discussion

The forum discussion centered on a coin showing clear signs of mint mark removal. Multiple experienced collectors identified the same issues:

“Looks like removed S. At the very least, it’s suspicious.”

“The coin has issues, but that may be the biggest one. It sure appears it is a removed MM”

“Mint mark probably removed and then harshly cleaned to try to hide the surface disturbance”

These consistent observations from multiple experts demonstrate the reliability of identifying specific alteration patterns.

Ethical Considerations and Next Steps

The original poster revealed they already owned the coin, creating an ethical dilemma about disclosure and proper handling.

Disclosure Requirements

Forum members strongly advised against attempting to pass the coin as genuine:

• “No good… don’t buy.”
• “Even if this were TPG-authenticated as a P, they’ve been known to make mistakes and it will always be a problem coin.”
• “Pass”

Handling Altered Coins

Suggestions for dealing with confirmed altered coins included:

• Defacing the coin to prevent future misrepresentation
• Melting as a last resort
• Keeping as an educational example of alteration techniques

Prevention and Due Diligence

Protecting yourself from altered coins requires ongoing education and careful purchasing practices.

Education and Research

Staying informed about common alteration techniques and authentication methods is crucial. Resources like VAMWorld, specialized books, and collector forums provide valuable information for developing authentication skills.

Purchase Precautions

When acquiring valuable coins:

• Buy from reputable dealers with return policies
• Request detailed photographs before purchase
• Consider professional authentication for high-value items
• Join collector communities for peer review opportunities

Conclusion: The Value of Authentication Knowledge

The 1928 Peace Dollar authentication case study demonstrates the critical importance of detailed examination and expert knowledge in coin collecting. While the specific coin in question showed clear signs of alteration, the discussion provided valuable insights into authentication techniques that apply to many collectible coins.

For collectors and investors, developing authentication skills protects both financial investments and the integrity of the numismatic market. The ability to identify altered coins, understand common counterfeiting techniques, and apply proper testing methods ensures that your collection maintains its genuine value and historical significance.

Remember that authentication is an ongoing learning process. Each examination, whether successful or revealing a counterfeit, contributes to your expertise and helps protect the broader collecting community from fraudulent representations. Stay vigilant, continue learning, and always prioritize authenticity over apparent rarity or value.

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