 In addition to altered dates , electrotypes of the 1804 dollar were created , both for the purposes of study and fraud . One such coin in the collection of the San Francisco Mint was described by them as genuine from 1887 to 1927 . <unk> were also created by Mint employees , and one was used as the basis for the pantograph reproductions which appeared in Eckfeldt and DuBois ' 1842 A Manual of Gold and Silver Coins of All Nations . 
