ITALY.FERRARA.Borso D'Este 2nd period Duke of Modena and Reggio AD 1452-1471 and elevated from Marquis to Duke of Ferrara for one year AD 1471.AE.Quattrino. ( 0.51g, 15.7mm, 7h )
+ BORSIVS•DVX, crowned double headed eagle.
Reverse.+ DE•FERARIA, shield.
Ref:CNI X pg.432.27 ( only four examples recorded ).
Very fine. Very rare.