Tag Archives: glue coin

Clashed, Vised or Glued?

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Clash marks are valuable, but people often try to mimic them with a vise, pressing two coins together. Other times, for one reason or another, glue creates an impression of one coin on another. Do not bid on any of these until you can tell them apart. As you might imagine, eBay and online auctions often label vise and glue coins as clash marks.

Here are all three:

You can easily distinguish them by looking for specific tells under a loupe or magnifying glass. You want to check if the extra impression is raised or sunken, and whether the lettering is oriented normally or backwards. If backward, you’re looking at a vise or glue coin.

TYPECLASH MARKSVISE COINGLUE COIN
RELIEFRaised DevicesSunken DevicesFlat Layered
ORIENTATIONNormalBackward/ReversedBackward/Reversed
THICKNESSNormalFlat/DistortedThick/Sticky

A die clash happens at the Mint when erroneously the obverse and reverse dies strike each other without a blank planchet between them. The so-called “ghost” image will be raised, not sunken or flatly layered.

Vise coins are created by pressing two coins together with a vise or hammering them to mimic the clashed die. Because of the method, the lettering will be backward, flattened, distorted or damaged, especially by the rims.

A glue coin happens any number of ways when two coins are bonded by an adhesive. When separated, the ghost image appears flat and layered on the other coin.

Often the tone of the coin will be altered with a dried or amber look, as you might anticipate with glue. True, flat and layered can be confused with raised of a die clash. To be sure, dip the coin in acetone and the ghost will dissolve.

Sometimes people use a vise to create weird patterns, thinking those unfamiliar with how coins are minted will consider this an error or variety.

You’ll find many more examples of vise and glue coins on Facebook because few people know how to tell these apart from clashed dies. They find them in rolls, typically, because someone realized this wasn’t a mint error.

Sometimes glue takes strange shapes. Again, you need to know how coins are made to understand how this could never happen at the Mint.

Depending on the condition of the coin and the denomination, because clashed dies, vise jobs and glue coins happen across denominations, values vary from minor examples $30 to major ones in the hundreds or even thousands of dollars.

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You can find more information about types, varieties, errors, grading, bidding and buying in Coin News Updated: The Essential Guide to Online Bidding. Please consider buying or gifting the work for a friend, as it underwrites this hobbyist blog. Thank you.

Double Denomination/Struck Coin

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Double denomination coins are genuine errors struck on a previously struck planchet of a different denomination (e.g., a cent on a dime). Double struck coins are struck twice with the same dies, often overlapping. 

Let’s investigate these genuine error coins and distinguish them from post mint damage (vise and glue coins).

Double Denomination

A double denomination error happens when a previously struck coin, often a smaller denomination like a dime, is fed into a press for a larger denomination like a cent. Because there are two denominations, struck over each other, the error is known by this name. Typically, this happens when struck coin bounces or falls into the wrong hopper or is jammed in the machine, coming loose during striking of another coin.

Technically, this is a machine error. But unlike machine doubling, double denomination coins are rare and highly sought after. The strike also usually ends up misaligned on the planchet.

The most frequent holdered examples include the so-called “11-cent coin”–a cent on a dime. Often a Roosevelt dime is struck with a Lincoln cent. One way to tell is identifying the reeded edge from the dime. Replicas and fakes often do not include this identifying aspect.

Other denominations include a 15c Coin, or Jefferson Nickel on a Cent; 35c Coin, or Quarter on a Dime; and a $1.05 Coin Sacagawea Dollar on a Nickel.

Also, the dates of these double struck coins do not have to match. Two different dates usually occur with machine-jammed coins that come loose during striking of another, as in this example:

Double Struck

This error happens when a struck coin did not eject from the coining chamber and gets struck again, or several times. The result is an overlapping and distorted design with one strike flattening the other. Some double-struck coins have a date; others, as in the above example, do not.

There are different types of double struck coins. The most common is a coin struck correctly that doesn’t eject with the second strike off center. Another type happens with a second image struck over the first. Less common are multiple strikes,

You can see the various examples on the PCGS website. Here’s a double struck off center cent from that site:

The most common double strikes include Lincoln Cents (1959-2008) and clad Jefferson Nickels, Roosevelt Dimes and Modern Washington Quarters.

Vise and Glue Coins

A “vise job” is evidence of post mint damage. It is not an error. Someone squeezed one coin atop another using a vise, hammer or pliers so that it resembles a double struck or denomination coin.

You can spot a vise job when letters or the date appeal backward or the design is sunken into one rather than raised as would be a genuine error.

Note the backward spelling of “America” on this coin:

You can also do similarly with glue. These often appear like double strikes with a ghost image seemingly stuck to a regular strike. Upon inspection, you should see a foreign raised substance. A person uses glue to get an imprint of one coin and then layers it on another. If the raised area looks shiny, you probably have a glue coin.

As the glue dries, however, it may turn darker rather than transparent, looking like metal as below:

If in the market to purchase a double denomination or double struck coin, and are unsure how to identify replicas and forgeries, make sure that it is in a reputable holder. Keep in mind that China has been exporting these fakes. Here’s some examples from Etsy, all selling for under $30.

If you are interested in the various coin conditions like double denomination and double struck, be sure to visit our illustrated coin glossary, the largest on the web, with close to 300 entries.

If you like posts like this, subscribe so you can be informed whenever there is a new article or column.

Proxiblog also has thousands of followers on Facebook Coin Groups, YouTube and other social media. To get the latest discussion and commentary, be sure to friend us by clicking here.

You can find more information about types, varieties, errors, grading, bidding and buying in Coin News Updated: The Essential Guide to Online Bidding. Please consider buying or gifting the work for a friend, as it underwrites this hobbyist blog. Thank you.