Ferrarese 15th Century, (artist), Ercole I d'Este, 1431-1505, 2nd Duke of Ferrara, Modena, and Reggio 1471, 15th century, gold ducat/Struck, overall (diameter): 2.46 cm (15/16 in.), gross weight: 3.44 gr (0.008 lb.), axis: 7:00.
Ferrarese 15th Century, (artist), Ercole I d'Este, 1431-1505, 2nd Duke of Ferrara, Modena, and Reggio 1471, 15th century, gold ducat/Struck, overall (diameter): 2.46 cm (15/16 in.), gross weight: 3.44 gr (0.008 lb.), axis: 7:00