NGC Counterfeit Detection Methods 2

Question 1

Which diagnostic tool uses magnetic properties to help distinguish genuine U.S. coins from counterfeits?

Accepted Answer

Sigma Metalytics Precious Metal Verifier

Answer

The Sigma Metalytics Precious Metal Verifier uses electromagnetic properties to verify metal composition without damaging the coin.

Question 2

On a genuine Morgan Silver Dollar, the eagle's breast feathers should display what characteristic under magnification?

Accepted Answer

Clearly defined individual feathers with crisp detail

Answer

Genuine Morgan dollars show crisp, individually defined breast feathers that are a hallmark of authentic die work.

Question 3

What is a 'spark test' used to detect when authenticating coins?

Accepted Answer

Applying electric current to detect plating

Answer

Applying low electric current can reveal plated coins since the base metal beneath a plating layer conducts differently.

Question 4

Die-struck counterfeits are generally considered more dangerous than cast fakes because they:

Accepted Answer

Reproduce sharper detail and correct surface texture

Answer

Die-struck counterfeits are pressed with hardened dies, reproducing much sharper detail and more authentic-looking surfaces than cast fakes.

Question 5

When examining a suspected counterfeit Trade Dollar, which area is MOST commonly found to show weakness or incorrect lettering?

Accepted Answer

The motto 'E PLURIBUS UNUM'

Answer

Counterfeiters often struggle to perfectly replicate fine motto lettering, and 'E PLURIBUS UNUM' on Trade Dollars is a frequent weak point.

(NGC) Numismatic Guaranty Corporation Certified Professional Practice Test