1901-S Barber Quarter Key Date G/ Ag. The item "1901-S Barber Quarter Key Date G/ Ag" is in sale since Friday, June 19, 2020. This item is in the category "Coins & Paper Money\Coins\ US\Quarters\Barber (1892-1916)". The seller is "tennesseecoin" and is located in Greenbrier, Tennessee. This item can be shipped to United States.