Obsolete currency (generally known as copyright or broken copyright) was issued by banks in the course of the antebellum and Civil War period within the 1780s through 1866 in The usa. Presumably backed by gold, this currency was employed domestically to simplify commerce for transactions demanding gold coins. https://shanercmuz.thekatyblog.com/32120100/the-best-side-of-top-grade-copyright-dollars