Most of these coins bearing an 'S' mintmark are not proofs. Starting in May 2012, these coins began circulating in Ecuador, which has adopted the US Dollar as it's currency. Production resumed again in 1999 due to the introduction of the Sacagawea Dollar. No coins were made for circulation from 1981-1998. The standard weight of these coins was 125 grains.Ī very good site to see the differences between:ĭue to the coin's similar size to the Quarter, it was badly accepted and eventually withdrawn. United States Mint of San Francisco, United States (1854-date) United States Mint of Philadelphia, United States (1792-date) United States Mint of Denver, United States (1906-date) Frank Gasparro was the tenth Chief Engraver of the United States Mint, holding this position from Februto January 16, 1981.
