Counterfeit (CTF)

In numismatic cataloging, a Counterfeit designation refers to coins that are documented reproductions of genuine U.S. Mint issues. This includes two fundamentally different categories: contemporary counterfeits — produced during the era the coin was current, intended to circulate as money — and numismatic counterfeits — produced to deceive collectors into paying genuine-coin prices for fabricated specimens. Contemporary counterfeits hold a respected place in American numismatics as historical artifacts in their own right. They document economic conditions, monetary policy failures, and the ingenuity of illicit coin makers across two centuries. Numismatic counterfeits, by contrast, are objects of study for authentication purposes. The NumisDex catalog tracks documented counterfeit varieties to help collectors identify them and understand their characteristics.

How Does It Happen?

Contemporary Counterfeits

Contemporary counterfeiting — the production of fake coins for use in everyday commerce — has existed as long as coinage itself. In the United States, counterfeiting was especially widespread during several historical periods:

Colonial and Early Republic era (1650s-1820s): Before and after independence, the lack of a strong central monetary authority created opportunities for counterfeiters. The diverse mix of foreign and domestic coins in circulation made detection difficult. Counterfeit British halfpence, Spanish reales, and early U.S. copper coins circulated freely in many regions.

Gold rush era (1849-1860s): The discovery of gold in California and the subsequent expansion of gold coinage created new counterfeiting opportunities. Counterfeiters produced base-metal imitations of gold coins with thin gold plating, or reduced the gold content of genuine-appearing coins. The remote locations of many commercial transactions made detection challenging.

Civil War era (1861-1865): The economic disruption of the Civil War, combined with the hoarding of hard money and the introduction of paper currency, produced a surge in counterfeiting. Both coin and currency counterfeits were widespread, prompting the creation of the U.S. Secret Service in 1865.

Small denomination counterfeits: Even low-denomination coins were counterfeited when the metal value of the coin was less than the face value. Cast copies of large cents, half cents, and later copper-nickel and bronze issues circulated in areas where detection capabilities were limited.

Contemporary counterfeit production methods include:

1. Die striking: The counterfeiter produces steel dies (either by engraving or by using a genuine coin as a hub) and strikes blanks on a press. Die-struck counterfeits are the highest quality and most difficult to detect.
2. Casting: Molten metal is poured into a mold made from a genuine coin. Cast counterfeits show characteristic surface porosity, seam lines, and reduced detail compared to struck originals.
3. Electrotyping: Two thin shells — one for obverse, one for reverse — are produced by electrodeposition from a genuine coin. The shells are joined and filled with base metal. Electrotypes show a visible seam at the edge.
4. Spark erosion: A modern technique using electrical discharge to erode die cavities from a master. Produces high-fidelity dies but leaves characteristic surface texture.

Numismatic Counterfeits

Numismatic counterfeits — fakes produced to deceive collectors — target high-value coins where the profit margin justifies the production effort. Modern numismatic counterfeiting is a global industry, with production concentrated in regions where enforcement is minimal. Common targets include:

• Key-date coins (1909-S VDB Lincoln cent, 1916-D Mercury dime, 1893-S Morgan dollar)
• Gold coins of all denominations (high metal value plus numismatic premium)
• Colonial and early American issues (limited surviving population makes comparisons difficult)
• Popular varieties and errors (doubled dies, overdates, mules)

How to Identify a Counterfeit

Authentication is a multi-layered discipline combining visual inspection, physical measurement, and scientific analysis:

• Weight and dimensions: Genuine U.S. coins were struck to precise weight standards. A coin that deviates significantly from the published weight for its type and date is suspect. Precision scales measuring to 0.01 grams are essential for screening.
• Specific gravity: The specific gravity (density) of a coin reveals its metal composition without destructive testing. Gold, silver, copper, and their alloys each have characteristic densities. A "gold" coin with the density of brass is a counterfeit. Specific gravity testing requires only a precision scale and a cup of water.
• Die characteristics: Genuine U.S. Mint dies produce coins with specific flow line patterns, surface textures, and detail profiles that counterfeit dies struggle to replicate. Under magnification, the luster, cartwheel effect, and die polish lines on a genuine coin differ from the surface of a cast or poorly struck counterfeit.
• Edge examination: The edge of a coin provides critical authentication data. Reeded edges should show uniform, evenly spaced reeding produced by the collar die. Counterfeit reeding is uneven, irregularly spaced, or shows file marks. Cast counterfeits show a seam line at the edge where the mold halves met.
• Diagnostic markers: For specific dates and types, published counterfeit diagnostics identify features unique to known counterfeit die families. PCGS, NGC, and the American Numismatic Association publish guides documenting these diagnostics.
• Magnetic testing: Genuine U.S. gold and silver coins are non-magnetic. Many counterfeit coins use ferrous (iron-based) core metals that respond to a magnet. A rare earth magnet held near the coin's surface detects ferrous content.
• XRF analysis: X-ray fluorescence spectroscopy provides a non-destructive elemental analysis of the coin's surface composition. Major grading services use XRF as a standard authentication tool. It identifies plated counterfeits, wrong-alloy forgeries, and altered compositions.

Visual Authentication Quick Reference

Notable Examples

Henning Nickels (1939-1944 Dates)

Francis LeRoy Henning produced an estimated 500,000 counterfeit Jefferson nickels dated 1939, 1944, 1946, 1947, and 1953 in the early 1950s. The 1944 Henning nickels are the most famous because they lack the large mint mark above Monticello that all genuine 1944 nickels carry (wartime silver nickels displayed a prominent P, D, or S above the dome). Henning used the standard copper-nickel alloy rather than the wartime 35% silver composition, making his 1944 counterfeits immediately identifiable by weight and color. Henning nickels are avidly collected as a historical curiosity, and authenticated examples sell for premiums above their face value.

Omega Counterfeits (Morgan Dollars)

A prolific family of counterfeit Morgan dollars traced to the same die shop, identified by a tiny omega-shaped mark in a consistent location. These counterfeits target high-value dates including 1893-S, 1889-CC, and 1895. The omega mark — once identified — allows rapid screening, but the overall quality of these counterfeits deceived many collectors before the diagnostic was published.

Chinese Mass-Produced Counterfeits

Since the early 2000s, factories in China have produced millions of counterfeit U.S. coins targeting the collector market. These counterfeits cover virtually every denomination and date, with quality ranging from crude castings to sophisticated die-struck reproductions. The volume and variety of Chinese counterfeits represent the most significant threat to modern collectors. Major grading services have developed extensive reference collections and diagnostic databases to identify these productions.

Contemporary Counterfeit Large Cents

Cast and die-struck counterfeit large cents from the 1790s through 1850s are collected as a specialty. These coins were produced to circulate at face value during an era when copper cents were scarce in many regions. Collectors study the die work, casting quality, and metal composition of these counterfeits as evidence of early American economic life. Several die families have been cataloged and assigned reference numbers.

Collecting Tips

• Third-party grading is mandatory: For any coin with significant value, PCGS or NGC certification provides professional authentication. The cost of grading is negligible compared to the risk of purchasing a counterfeit. Never buy expensive raw (uncertified) coins without expert examination.
• Know the diagnostics: For the specific series you collect, study the published counterfeit diagnostics. The PCGS CoinFacts website, NGC's Counterfeit Detection resources, and the ANA's authentication guides document known counterfeit die families with diagnostic photographs.
• Buy the book before the coin: Invest in reference materials specific to your collecting area. Authentication skill is built through study, and the cost of reference books is far less than the cost of a single expensive counterfeit purchase.
• Contemporary counterfeits are collectible: Authenticated contemporary counterfeits — especially those from the 18th and 19th centuries — are legitimate collectibles with their own market and scholarship. They represent American monetary history and are studied for their manufacturing techniques and distribution patterns.
• Weight testing is your first defense: A precision scale ($20-50) catches a significant percentage of counterfeits. Keep a reference chart of standard weights for the denominations you collect and weigh every acquisition.
• Source matters: Buy from established, reputable dealers and auction houses. Dealers with professional reputations stake their livelihoods on selling genuine coins and stand behind their sales. Online marketplace purchases from unknown sellers carry substantially higher counterfeit risk.
• When in doubt, don't buy: If a deal looks too good, or if a coin gives you an uneasy feeling upon examination, walk away. The supply of genuine coins is large enough that passing on one suspect coin costs nothing.

Related Error Types

• Transitional Reverse Design (TRN) -- Genuine Mint errors that are frequently counterfeited due to their extreme value
• VAM Variety (VAM) -- The VAM system catalogs documented counterfeit Morgan and Peace dollars alongside genuine varieties
• Wrong Planchet (WPL) -- Wrong planchet errors are authentication targets, as counterfeiters fabricate these high-value errors
• Unidentified Fascinating Oddity (UFO) -- Unexplained features that require examination to distinguish from counterfeit tooling marks