Coin Term Glossary

A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

R

S

T

U

V

W

X

Y

Z

Keeping up with the terms and jargon can be sometimes frightening. We hope that the following Coin Collecting Glossary on the most frequently used terms, acronyms and definitions will be beneficial to you. If we missed a word or phrase, please contact us and let us know. We would like to grow and expand this list with your help.

 

O

O

Mintmark used to signify coins struck at the New Orleans, Louisiana branch Mint.

Obsolete

A coin design or type that is no longer produced.

O-Mint

Term used for the coinage of the branch Mint in New Orleans, Louisiana.

Obverse

The side of the coin that generally shows the Coat of Arms, President’s or Monarch’s bust. Obverse side are referred to as heads and is the front of the coin. Generally the date side.

Oct

Short for octagonal

Off center

A coin struck on a blank that was not properly centered over the anvil, or lower, die. Coins that are 5 percent, or less, off center are graded by PCGS as a regular coin. Those struck off center more than 5 percent are graded as error coins.

Orange-peel Surfaces

The dimple-textured fields seen on many Proof gold coins; their surfaces resemble those of an orange, hence the descriptive term.

Ore

A naturally material from which metals are extracted by means of mining practices.

Original

A term used to describe a coin that never has been dipped or cleaned.

Original Rolls

Coins in fixed quantities wrapped in paper and stored at the time of their issuance. Silver and gold coins stored in these rolls often have peripheral toning and untoned centers. The coins stored in rolls suffered fewer marks than those in coin bags.

Original toning

Term for the colour acquired naturally by a coin that never has never been cleaned or dipped. Original toning ranges from the palest yellow to extremely dark blues, grays, browns, and finally black.

Over -mintmark

A coin struck with a die on which one mintmark is engraved over a different mintmark.

Over Dipped

A coin that has become dull from too many baths in a dipping solution

Overdate

A coin struck from a die with a date that has one year punched over a different year. Sometimes an effort is made to polish away evidence of the previous date. PCGS requires the overdate to be visible to be recognized.

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