Die Deterioration Doubling

Usually appears late in die life and is caused by fatigue around the base of recessed design elements on the die. These areas receive a large amount of friction as the metal flows during the strike. The carbon in the dies steel dissipates and results in the collapse of those areas over a period of time, depending on the quality of the steel used to form the dies. This doubling usually extends all sides of the raised element both sides and all over the die, often both of the die pair are affected.

Sometimes accompanied by fields exhibiting
"orange peel effect" dies typical of worn dies.

Dies that clash are routinely polished to remove the damage and make the die usable. Often the polishing will leave a "shelf" around design elements on the die. When these Dies strike coins, they may appear to have elements with extensions and doubling. Concave dies, convex dies and flat dies all take polishing a little differently from each other. The fields of a convex die are not flat - they are curved outward. When these dies are polished it tends to flatten the fields. The base of design elements, numbers and letters in these areas will sometimes appear as doubling and/or added and/or extended design elements on the struck coin.

A coin described as Die Deterioration Doubling may include Polish Doubling as they can be very similar in appearance and sometimes impossible to distinguish how the effect occurred.

1962 One Cent -Queen's face
1962 One Cent -2 in date -Erroneously referred to in the past as "Re-cut Date"
1962 One Cent -962 in date -Erroneously referred to in the past as "Swing Re-entry Date"
1965 One Cent -Queen's face
1967 One Cent -Date -Double Date
1979 One Cent -Date -Double Date

1951 Five Cents -Obverse Portrait -Erroneously referred to in the past as "Re-entered Portrait"
1962 Five Cents -2 in date -Erroneously referred to in the past as "Recut Date"
1962 Five Cents -Date -Erroneously referred to in the past as "Re-entered Date"
1963 Five Cents -Back of beaver -Erroneously referred to in the past as "Re-cut"
1967 Five Cents -Date -Double Date
1967 Five Cents -Rabbit
1968 Five Cents -Forehead of beaver
1980 Five Cents -Date -Wide Date

1952 Ten Cents Date -Double Date -Erroneously referred to in the past as "Re-entered Date"
1968 Ten Cents Date -Double Date
1992 Ten Cents Date -Double Date

1996 Two Dollars "Extra Mountain"

Die Variety Directory | Canadian Error Coin Directory | Main Directory

Page created by: muckwa
Changes last made on: 02/11/04

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