$20 Saint-Gaudens Gold Coins MS 62
MS 62 is the contraction for the denotation "Mint State Grade 62". "62" is a grade on the Sheldon coin grading scale, developed by Dr. Sheldon, a numismatist and Psychologist. Coins that have not been circulated earn a grade of 60, and coins that are utterly perfect in every way earn a grade of 70 which is the top of the Sheldon scale. Old gold coins such as these are seldom ever seen in a 70 condition, and usually top out on the scale at a 66 or 67.
Specifics of the Grade
A $20 Saint-Gaudens gold piece in MS 62 will show some wear in the form of nicks and scratches, and these mars will probably be in the more prominent areas of the coin, such as the "Striding Lady Liberty" on the front of the coin or the nested eagles design on the reverse of the coin. The MS 62 designation may also be assigned to a coin which has only a few scars from wear and tear over the decades, but exhibits several cracks or die flaws from it's original minting.