The Machins Mills coins, minted around 1775, are a notable type of collectible coin in American numismatics. These copper tokens were produced in New York during the American Revolutionary War period. They were primarily used as a form of currency in the colonies and are recognized for their distinctive designs, which often featured a profile portrait of a person along with varied inscriptions. Due to their historical significance and limited production, Machins Mills coins are highly sought after by collectors and hold a prominent place in American coinage history.