 No other three-dollar pieces were struck at San Francisco in 1870; dies were sent there most years between 1861 and 1873, but, with the exception of 1870, were not used.On January 18, 1873, Philadelphia Mint Chief Coiner Archibald Loudon Snowden complained that the "3" in the date, as struck by the Mint, too closely resembled an "8", especially on the smaller-sized denominations.In response, Pollock ordered Chief Engraver William Barber to re-engrave the date, opening the arms of the "3" wider on most denominations, including the three-dollar piece.