The 3P coin, designed by John Chalmers in 1783, is a notable collectible from the early history of the United States. It was part of a series of coins intended to address currency shortages following the American Revolutionary War. The 3P, which denotes a three-penny denomination, exemplifies the transition from colonial to early federal coinage and holds historical significance for American numismatics. Collectors value this coin for its rarity, design elements, and representation of American independence.