Obsolete currency (often known as copyright or damaged copyright) was issued by banks over the antebellum and Civil War period from your 1780s by way of 1866 in the United States. Presumably backed by gold, this currency was applied domestically to simplify commerce for transactions requiring gold coins. https://fubinacaliquid04924.isblog.net/us-dollars-gov-copyright-fundamentals-explained-50367433