when was the us dollar backed by silver
History of the United States dollar United States silver certificates were a type of representative money printed from 1878 to 1964 in the United States as part of its circulation of paper currency.[16] They were produced in response to silver agitation by citizens who were angered by the Fourth Coinage Act, and were used alongside the gold-based dollar notes. The silver certificates were initially redeemable in the same face value of silver dollar coins, and later in raw silver bullion.