1 Mun; Large Type Yong

Cast in 1742 under King Yeongjo, this issue belongs to a period of intense monetary experimentation in Joseon. The court had been forcing copper cash into circulation since the 1670s against persistent merchant and peasant resistance — a population accustomed to rice and cloth as exchange media. By the 1740s, the coinage was finally embedded in everyday commerce, but counterfeiting and weight manipulation had become serious enough that authorities periodically revised casting standards, producing the size and weight distinctions that generate the "Large Type" and related variety classifications collectors use today.