Untitled Document1339, Genoa (Republic), Simon Boccanegra (Doge). Silver Grosso CoinMint Period: ca. 1339-1344 References: MIR 33 CNI 165/183. Denomination: Grosso (thick penny) Doge: Simone Boccanegra (4th Doge of Genoa, 1356-1363) Diameter: 22mmWeight: ca. 3gmMaterial: SilverObverse: Stylized castle (arms of the Genoese Republic). Sigla (G) below. All within polylobe adorned with dots i ...