$20 Saint-Gaudens Gold Coins MS 63
MS 63 is the contraction for the denotation "Mint State Grade 63".Coins in this grade are uncirculated, and in a condition pleasing to the unaided eye. The "63" refers to the Sheldon coin grading scale which runs on the very low end at "1" at tops out at a perfect score of "70". Old soft gold coins such as the $20 Saint-Gaudens are seldom seen in grades higher than "66" however, and the premium over the spot price of gold increases with every successive higher grade of coin condition.
Specifics of the Grade
A $20 Saint-Gaudens gold piece in MS 63 condition will still have areas of "Mint luster" or what the untrained eye will see as "Shine". Any marks or scars on the coin will be relatively few or small compared to coins of a lesser grade. The details of the coin were probably sharp at the original striking of the coin, and several die cracks or worn details would probably result in a lower grade than that of MS 63.