The Shield Earring dollar in copper believed t0 have been purchased by Byron Reed at the 1891 Doughty sale.
This is one of 5 confirmed examples. As there are 7 known of the quarter and half dollar, it is likely that a couple of others are out there. For additional information on this, click here. For additional information on all shield earring pieces, click here.
Photo from the Byron Reed Collection; owned by the City of Omaha, Nebraska; on loan to The Durham Museum.