What is the origin of the idiom "in mint condition" and when to use it?

The idiom "in mint condition" originated from the field of numismatics, which is the study and collection of coins. It refers to the pristine state of a coin that has not been circulated or damaged, resembling the condition of a newly minted coin. Over time, the phrase has been extended to describe any object that is in a perfect, pristine, or like-new condition, often implying that it has been well-preserved or carefully maintained.