Probably a ducat from the wreck of the Vliegend Hart, which sank on its second voyage to Batavia, then a trading post of the Dutch East India Company (VOC) in February 1735. The ship went down, carrying with it a valuable cargo of precious metals, including 5160 gold ducats. Three chests, the contents of which were recovered from a shipwreck off the coast of Vlissingen (Zeeland province) in 1983 and 1992, contained the Utrecht 1728 ducats (16 pcs.), Utrecht 1729 ducats (2164 pcs.), Holland 1729 ducats (1980 pcs.) and West Friesland 1729 ducats (1000 pcs.). Interestingly, the same name was previously used by another ship of the East India Company fleet, used from 1638 to 1643.
Absolutely mint condition with lots of mint luster. A coin with an extremely high relief, unseen even on other mint condition Netherlands ducats; very deeply minted specimen.