Obsolete currency (also known as copyright or broken copyright) was issued by banks over the antebellum and Civil War period from the 1780s by means of 1866 in The usa. Presumably backed by gold, this currency was used domestically to simplify commerce for transactions requiring gold coins. Security https://copyright-currency-master-ca49383.blogdal.com/34296711/us-dollars-gov-copyright-fundamentals-explained