TPG Variety Attribution: Authentication Guide for Collectors

Understanding Third-Party Grading Attribution Services

With counterfeits flooding the market, knowing the specific diagnostic points for this item is critical. When it comes to coin authentication and attribution, third-party grading services (TPGs) play a vital role in the numismatic community. However, their approach to variety attribution varies significantly, and understanding these differences can save collectors both time and money.

How TPGs Handle Variety Attribution

According to industry experts, the process of variety attribution by TPGs follows a somewhat standardized approach. When a coin is submitted for grading with a specific variety attribution request, the service will typically verify whether the coin matches a known, documented variety from established references.

As one experienced numismatist noted, “Zero. They only attribute known varieties in certain standard references.” This means that if a variety isn’t listed in a reputable source, it essentially doesn’t exist in the eyes of most TPGs. The reasoning is straightforward: a variety not listed anywhere doesn’t exist until it is listed in a reputable source.

Research Process for Unlisted Varieties

However, the reality is more nuanced than simply rejecting unlisted varieties. When a submitter asks for research on an unlisted variety, the TPG actually performs more work than with a listed variety. Every known variety must be ruled out before determining that a coin represents something new or unlisted.

One industry professional explained that if the variety is not listed anywhere, “more research is being done than if it is, because every listed variety (or at least every variety acknowledged by the TPG) has to be ruled out.” This thorough elimination process is crucial for maintaining the integrity of the attribution system.

Key Authentication Markers and Testing Methods

For collectors seeking to authenticate coins or verify variety attributions, several testing methods and markers are essential:

Weight Verification

Weight is often the first line of defense in authentication. Genuine coins should match their specified weight within acceptable tolerances. Using a high-precision scale (measuring to at least 0.01 grams) can quickly identify potential counterfeits or altered pieces.

Magnetic Properties Testing

Testing a coin’s magnetic properties can reveal whether it contains the correct metal composition. Most precious metal coins should be non-magnetic, while certain base metal compositions may show magnetic attraction. This simple test can eliminate many counterfeit pieces immediately.

Die Markers and Diagnostics

Die markers are unique characteristics that help identify specific die pairs or varieties. These can include:

• Die cracks or breaks
• Repunching or overpunching of mint marks
• Die chips or gouges
• Polishing marks or wheel marks
• Clash marks from die collisions

Common Fakes and Alterations

Understanding common fakes is crucial for authentication. Some frequent alterations include:

• Mint mark additions or removals
• Date alterations
• Cast counterfeits versus struck counterfeits
• Altered surfaces to simulate higher grades

TPG Attribution Fees and Services

Each TPG charges an extra fee for attribution services. This fee structure reflects the additional research and verification time required beyond standard grading. However, the value of this service depends on your specific needs and the rarity of the variety in question.

ANACS, for example, is noted for attributing far more varieties than most services, particularly for pre-1877 half dimes and dimes. This specialization makes them a preferred choice for certain series of coins.

Documentation and Reference Sources

Successful variety attribution relies heavily on established references. Key sources include:

• Standard catalogs like the Red Book
• Specialized references for specific series (VAM catalogs for Morgan dollars, etc.)
• Professional publications and journals
• Online databases and forums

The Role of Gatekeepers in New Discoveries

For truly new discoveries that aren’t listed in any reference, the process becomes more complex. Each coin type typically has a “gatekeeper” – an expert who evaluates new potential varieties. These gatekeepers might include specialists like John Dannreuther for trade dollars or other recognized authorities for different series.

The process usually involves sending the coin directly to the gatekeeper along with documentation from the TPG explaining why the coin appears to represent a new variety. This collaborative approach helps build the body of knowledge in numismatics.

Variability Among TPG Services

Experience shows significant variability among TPG services. Some collectors report that certain services struggle with basic variety recognition, even for well-documented Redbook varieties. This inconsistency highlights the importance of choosing the right service for your specific needs.

As one collector noted, some services “bat around .900 when you tell them exactly what it is,” but may struggle when asked to identify varieties independently. This suggests that clear communication and specific instructions are crucial when submitting coins for attribution.

Best Practices for Collectors

For collectors navigating the world of variety attribution, several best practices emerge:

1. Know exactly what variety you believe the coin to be before submitting
2. Provide clear, specific instructions to the TPG
3. Choose the right TPG for your specific coin type
4. Be prepared for potential rejection of unlisted varieties
5. Consider the cost-benefit ratio of attribution fees

Conclusion

Understanding TPG variety attribution is essential for serious collectors. While the process may seem daunting, knowing what to expect and how to navigate the system can significantly enhance your collecting experience. Whether you’re verifying a common variety or exploring the possibility of a new discovery, being informed about the attribution process will help you make better decisions and avoid costly mistakes.

Remember that authentication is as much about knowing what to look for as it is about having the right tools and references. By combining proper testing methods with an understanding of how TPGs approach variety attribution, collectors can build more meaningful and valuable collections while avoiding the pitfalls of counterfeits and misattributions.

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