dating: Second part of the 20th Century provenance: Italian Republic , Made of gold. On the front, a female figure with shield showing the old coats of arms of the four ancient Maritime Republics: Venice, Pisa, Genoa and Amalfi. Mark 'Z 917'. On the obverse, ''MEDAGLIA D'ONORE PER LUNGA NAVIGAZIONE COMPIUTA'. On ribbon. 917/1000 gold. 30 g. diameter 3.39 cm.