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





OBJET D'ART
- (French) An object of art.
OBSIDIONAL COIN
-See Siege Piece.
OBSOLETE COINAGE
- Coinage no longer in circulation use.
OBVERSE
- The more important of the two sides of a coin. In most countries it is "Heads," the side bearing the bust of the ruler or of some other important person.
OFF-CENTRE STRUCK
- A coin struck off centre relative to the planchet.
OFFICIAL FABRICATION
- Also Official concoction. A piece that was created for some special purpose unconnected with design proposals or experiments on coinage design or metals. Examples are the New Brunswick pieces dating 1870, 1871, and 1875 which were obviously not connected with an attempt to revive a separate coinage for that province after Confederation. See Concoction.
OFFICIAL ISSUE
- An authorized issue which has been given specific official sanction.
OFF-METAL STRIKE
- A metallic numismatic object struck in a metal other than that in which it is officially issued.
ONE YEAR TYPE
- A coin denomination that was only minted for one year in that particular design or type. The Canadian 20 cents or 1858, the 1904H 20 cents of Newfoundland are examples.
ORIGINAL
- Any coin, token, or medal that has never been "dipped" in a chemical solution to clean or brighten the con. Pristine. See Original Toning.
ORIGINAL MINT RED
- Reference to a copper coin that retains its full original reddish mint lustre and has never been cleaned or processed.
ORIGINAL, ROLL, BAG
- Descriptive of uncirculated coins, all of the same date, which were put away many years ago, and are therefore less likely to contain marginal or "slider" coins. There are a standard number of coins to a roll or bag, eg., 20 silver dollars to a roll and 1000 to a bag.
ORIGINAL TONING
- The toning on coins that have never been previously "dipped." The toning quality is of a very natural and pristine character. Coins that have been dipped and are retoned may appear rather dull or flat looking in their colour quality by comparison. See Toning and Artificial Toning.
OVERDATE
- The date made by a mint engraver superimposing one or more numbers on a previously dated die. The 1859 over 8 is an example. See also Recut Date.
OVERGRADING
- Giving a coin a higher grade description than it merits. Most owners have a natural tendency to overgrade their own coins and undergrade those they wish to buy.
OVERMINT MARK
- Mark of one mint superimposed over the mark of a different mint.
OVERPRICED
- A coin that has been priced higher than the market suggests as a fair retail price. May be a result of the coin being Overgraded and priced at this higher, incorrect grade.
OVERRATED
- Refers to a particular coin denomination and date in general or to a specific grade level of that coin that has been traditionally valued higher that it really should be, possible a result of a market promotion or a long time collector fascination with the coin, eg. the coinage of 1948 tends to be overrated in high quality grades. On the contrary, a coin that is underrated is a "Sleeper" in terms of proper recognition and value.
OVERSTRIKE
- A coin struck over another coin. The earlier type, if it shows through anywhere, is called the undertype.
OVERVALUED
- By overvaluing their coinage, many countries prevented the export of their precious metals.
OXIDATION
- The formation of oxides or tarnish on the surface of a coin from exposure to air, dampness, industrial fumes, or other elements. Platinum, gold, and nickel do not oxidize except for a very thin film which is invisible to the naked eye. However silver and copper when oxidized show definite colourations of the metal. See Original Toning and Corrosion.





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


 

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