AU-55 - Official A.N.A. Definition of Grade AU-55

About Uncirculated 55

Lincoln Wheat cent graded AU-55
Lincoln Wheat cent graded AU-55. Photo courtesy of Teletrade Coin Auctions


A circulated coin graded AU-55 will show only small patches of wear that are visible on the highest points of the design. As is the case with the other grades, wear often occurs in different locations on the coin based upon the coin's design. Eye appeal and surface condition are above average.

Going Beyond the Grade

All About Uncirculated coins can be very difficult to grade. A major part in determining the grade of an AU-55 coin is the amount of mint luster that is left on the surface of the coin. If the lighting is poor when you are examining the coin it may appear as a mint state uncirculated coin. Conversely, fluorescent lighting tends to over emphasize the amount of wear that is on the coin. This can lead you to grade the coin as one of the mid to lower circulated circulated grades (EF-45 to VF-30).

Although  this coin grade indicates that the coin has circulated, the wear on the coin should not be significant. Look closely at the high points of the design. There should be little to no loss of detail on the high points. However, you should notice that  the mint luster is missing on the high points of the coin. Additionally, the mint luster may be missing or muted in the open fields on the coin.

Proper Lighting and Inspection

In order to properly inspect a coin to determine if it is about uncirculated, use a 60 W to 75 W incandescent light bulb approximately 18 inches from the surface of the coin. Rock the coin back-and-forth to see if you can detect any disturbance or missing mint luster.

Pay special attention to the highest points of the coin's design. These areas will make contact with other coins and foreign surfaces first and rub away the original mint luster. Remember an uncirculated coin can still have contact marks and bag marks from the minting process. This should not be taken into consideration while determining if a coin is circulated or uncirculated.


The exact descriptions of circulated grades vary widely from one coin issue to another, so the preceding commentary is only of a very general nature. It is essential to refer to the specific descriptions for a particular coin type when grading coins. The correct adjectival term for the "A" in AU is About, not Almost.

While numbers from 1 through 59 are continuous, it has been found practical to designate specific intermediate numbers to define grades, resulting in steps. Hence, this website uses descriptions and their numerical equivalents, as approved by the ANA Board of Governors.

While the preceding guidelines will undoubtedly prove useful to the reader, it is strongly advised that viewing actual coins in the marketplace will enable you to better determine grading practices affecting the series of coins which interest you most. For example, the coin collector of Morgan silver dollars would do well to examine Morgans graded by a variety of services and sellers in order to determine in general what is considered to be AU-55 grades.

Reproduced with permission from The Official American Numismatic Association Grading Standards for United States Coins, 6th edition, © 2005 Whitman Publishing, LLC. All Rights Reserved.


Also Known As

Choice About Uncirculated-55, About Uncirculated 55

Common Misspellings and Misuse

Choice Almost Uncirculated-55, Almost Uncirculated 55

Example Usage

A coin graded AU-55 will show wear on only the highest points of the coin.

More Grading Definitions