Grading is not an exact science where a formula can be applied, and everyone comes out with the same result. Over the years, Professional numismatists and coin grading services have agreed upon specific definitions, descriptions and Sheldon numeric values that help coin collectors describe their coins accurately (to a certain extent). Study the descriptions and photos to get a better understanding of how to grade Lincoln pennies. Circulated examples are always brown in color; if not, this is an indication that the coin has been cleaned. Grades of Mint State or uncirculated examples also take into account the color of the copper coin. This is designated as red (RD), red/brown (RB) or brown (BN). For example “MS63RB”. The photo illustrates the highest points (indicated by the color red) on the Lincoln wheat cent design.
