Spring PNNA Roll Call: Authentication Guide for Collectors

Historical Significance

The Pacific Northwest Numismatic Association (PNNA) show has long been a cornerstone event for coin collectors in the Pacific Northwest. For many years, this show called Seattle home, drawing collectors from across Washington State and beyond. The recent move to Portland, Oregon represents a significant shift in the numismatic landscape of the region.

The relocation stems from Washington State’s implementation of sales tax on coins and bullion, a decision that has dramatically impacted the coin collecting community. This tax change has forced many dealers and collectors to reconsider their participation in Washington-based shows, leading to the PNNA’s relocation to Portland’s more tax-friendly environment.

Identifying Key Markers

When authenticating coins from the PNNA era, several key markers should be examined:

Weight Specifications

Authentic coins from this period should meet specific weight standards. For silver coins, expect weights within 0.1 grams of the standard. Copper coins should be within 0.2 grams. Any significant deviation may indicate a counterfeit or altered piece.

Magnetic Properties

Most coins from this era should not be magnetic. If a coin is strongly attracted to a magnet, this is a red flag. However, some modern commemoratives may contain magnetic components, so research the specific issue carefully.

Die Markers

Authentic coins will display specific die markers that can be cross-referenced with known genuine examples. Look for:

• Die cracks in consistent locations
• Repunched mint marks where applicable
• Specific date positioning variations
• Unique collar die characteristics

Common Fakes and How to Spot Them

The numismatic market has seen an increase in sophisticated counterfeits, particularly since the PNNA show’s relocation. Common fakes include:

Altered Dates

Collectors should be wary of coins with suspiciously perfect date digits. Use magnification to examine the junction between the altered digit and the original date. Authentic alterations often leave microscopic evidence of tooling.

Cast Counterfeits

Cast counterfeits often display a grainy surface texture and lack the sharp detail of struck coins. The weight will typically be significantly off, and the coin may display casting bubbles or porosity.

Spark Erosion Counterfeits

These sophisticated fakes can be challenging to detect. Look for a “soft” appearance to the devices and lettering. The surface may display tiny pits or a pebbly texture under magnification.

Testing Methods

Specific Gravity Testing

This non-destructive test compares the weight of the coin to its volume, helping to verify the metal composition. Silver coins should register between 10.4 and 10.6, while gold coins should be between 17.0 and 17.3.

Die-Rotation Analysis

Authentic coins should display consistent die rotation. Use a protractor to measure the rotation between the obverse and reverse. Significant deviations from the known standard may indicate a counterfeit.

Microscopic Examination

Examine the coin under 10x to 30x magnification. Look for:

• Tool marks around devices
• Inconsistent edge reeding
• Surface irregularities inconsistent with the minting process
• Incorrect mint mark style or positioning

Value Guide

Condition Rarity

The value of coins from this era varies significantly based on condition. Coins graded MS-65 or higher command substantial premiums, particularly for key dates and mint marks.

Provenance Impact

Coins with documented provenance from the PNNA shows, particularly early Seattle shows, often carry a premium. Documentation might include original holders, show tickets, or dealer invoices.

Market Trends

The relocation of the PNNA show has created interesting market dynamics. Coins from the Seattle era have seen increased interest from collectors who attended those shows, potentially driving up values for high-grade examples.

Authentication Resources

Professional Authentication

For high-value coins, professional authentication is recommended. Services like PCGS, NGC, and ANACS can provide expert authentication and grading.

Community Verification

The coin collecting community remains an invaluable resource. Online forums, local coin clubs, and shows like the PNNA provide opportunities to consult with experienced collectors and dealers.

Conclusion

The authentication of coins from the PNNA era requires careful attention to detail and a thorough understanding of the minting characteristics of the period. With the show’s relocation creating new dynamics in the market, collectors must be particularly vigilant about authentication.

By understanding the key markers, common fakes, and proper testing methods, collectors can protect themselves from counterfeits while building valuable collections. The PNNA show’s move to Portland represents not just a change in venue, but a new chapter in the numismatic history of the Pacific Northwest.

Whether you’re attending the show in Portland or collecting coins from its Seattle era, remember that authentication is an ongoing process. Stay informed, use multiple testing methods, and when in doubt, seek professional authentication services.

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