A real Doge Coin.  Great detail on the face of the Doge, Saint Mark, and Jesus on the reverse.  Pietro Gradenigo was the 2nd Doge to strike these ducats, with the first being Giovanni Dandolo.  Giovanni Dandolo's ducats are exceedingly rare and expensive.  Pietro Gradenigo's are just slightly rare and a lot less expensive.  Usually hammered gold coins of this era will be filed, clipped, cleaned or polished, even holed or mounted in jewelry.  This coin has survived unscathed except for some wear on the high points.  This Doge's ducats are usually engraved and struck very well.  That's a tradition that lasted into the 1600's, with the last 100 or so years of Venetian ducats (1700-1798) being engraved and struck very poorly.