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Dime Struck Through Reeding
By Ken Potter
Numismatic News

Some collectors wait a very long time to find out what it is they have. This is the case this week where Alabama reader Richard V. sent in a 1973-D Roosevelt dime that he has been holding onto since the 1970s.

This one is referred to as "Struck Through Reeding." This can occur in several ways. One sequence of events that can lead up to this error type occurs when a press is striking coins with too much pressure. When this occurs some of the coins in the run will show what is called "finning."

Finning is planchet metal that is extruded up between the dies and collar due to excessive pressure. If the coin being struck contains reeding, the end result is that extreme examples can have a ring or partial ring of reeding that extends up over the normal area of the rim (most often on the obverse but on the reverse if it was the upper hammer die) almost like a coin with a short fence built around its circumference.

This "fence" is normally rather thin and pretty delicate and can easily break away from the coin. When it does break away from a coin and lands back in the dies, the strike-through-reeding error can occur.

Another way that these occur is when a coin sticks to a die and remains for a sequence of strikes. This coin is known as a "cap" and as long is it remain adhered to the die, it will strike "Brokage" errors or "Capped Die Strikes" (the latter being a stage that occurs after many brockages have been struck).

As a cap remains adhered to the die, it begins to spread with the excess metal wrapping itself up around the shank of the die. With each strike it wraps itself up higher and if it stays long enough can become too thin to remain intact and it begins to break up. At this point the reeded section of the cap may break away and end up in the dies to be struck into the next otherwise normal coin to be struck.

Richard says: "I have collected coins from circulation when I was a teenager in the mid 1960s. I got the usual Lincoln cents and branched out to other series. I even got a paper route just to go through more change and have a bit of spending money for coins."

Gregory Bogucki of Michigan found a 2008 Lincoln cent in change about six months ago that sports a lamination in the copper plating of the coin on the obverse. Laminations are often due to contaminants or gasses trapped within the metal causing it to split, peel or crack.

While this type is arguably the most common form of planchet error that can be found, it has nonetheless proven itself to be quite elusive in recent years since the advent of clad coinage and copper plated cents. It was more common on the 90 percent silver and homogenous bronze or brass coins of yesteryear.

Richard V. also sent in a nice lamination on a 1959-D Lincoln cent. Surface laminations such as the one shown here are referred to as "Lamination Peels" while others may be referred to as "Lamination Cracks," or simply as laminations. If a lamination is deep it is usually described as such.

Next we show a rolled and struck in rim burr on a 1970-D dime courtesy of Richard V. This error type occurs when a coin blank develops a burr for one of several reasons during its production or subsequent handling. This burr may then be rolled down into the blank as it is sent through the upset mill to have its edge raised to form it into a planchet.

Later, when the planchet is struck into a coin, the burr is struck deeper into the coin even with the field or design area that might be affected. The ring of copper that surrounds it is often present and an indication of authenticity. While interesting, it is generally considered minor and can be purchased relatively inexpensively even on coins as large as the Kennedy half.

Jose Cortez of Washington state found a 1964-D Lincoln cent that displays what looks like it could be the upper loop of the "6" of the date partially impressed (hubbed?) into the die in four different places. Unfortunately, this die has seen some severe die abrasion in the same area, which suggests that some damage occurred here and it was "dressed out" with abrasives (such as aluminum oxide cloth) to remove it. Thus, without seeing an early die stage it is impossible to state what the "dash-like" aberrations are other than an interesting effect. I ask readers that may have one of these in an earlier die state to let me know.

Ken Potter is the official attributer of world doubled dies for the Combined Organizations of Numismatic Error Collectors of America and for the National Collectors Association of Die Doubling. He also privately lists other collectible variety types on both U.S. and world coins in the Variety Coin Register. He is a regular columnist in "Numismatic News'" sister publication, "World Coin News," where he writes the Visiting Varieties column. More information on either of the clubs or how to get a coin listed in the Variety Coin Register may be obtained by sending a long, self- addressed envelope with 59 cents postage to P.O. Box 760232, Lathrup Village, MI 48076, or by contacting him via e-mail at KPotter256@aol.com. An educational image gallery may be viewed on his Web site at www.koinpro.com.


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