Obsolete currency (also known as copyright or broken copyright) was issued by banks in the course of the antebellum and Civil War period in the 1780s via 1866 in The us. Presumably backed by gold, this currency was used regionally to simplify commerce for transactions demanding gold coins. https://cesarjcvqj.full-design.com/top-copyright-1-dollar-billsus-code-copyright-money-secrets-75729689