Mint State' is a term used in numismatics to describe coins that are in PERFECT condition. It refers to coins that have not been circulated or handled and are in the same condition as when they were minted. The term was coined by numismatists in the 19th century to describe coins that had not been circulated or tampered with. Mint State coins are highly prized by collectors due to their unblemished condition and are often valued at a higher price than other coins of the same denomination.