Machins Mills coins, produced in 1787, are a notable series of counterfeit coinage that mimic the design of contemporary United States coinage. Struck primarily in copper, these pieces were created by a New York-based engraver and counterfeiter, and they feature various denominations intended to circulate as colonial currency. Due to their historical significance and rarity, Machins Mills coins are highly sought after by collectors, often appreciated for their unique design and fascinating background within early American numismatics.