ITALIAN STATES / VENICE: 1 Ducato (ND 1682 N.D) in silver (0,826) by Alvise Contarini. St Mark seated at left presenting staff with cross an pennant at top to doge kneeling at right, mintmaster intials in exergue on obverse. The lion of St Mark facing forward, left paw resting on open book above which is a castle on a hill on reverse. Inside slab by NGC "XF 40". Unique in pop in both companies. Cert number: 3931243-011. (KM 358) & (Dav# 4274).