Owner Comments:
The 1917 ducat is easy to get. It's basically a bullion coin. But this is a tough date. NGC has certified no other examples, and PCGS has certified none. However, I did see one sell more recently at the June, 2021 AA Muntenveiling auction, hammer 1300 EUR. These coins maybe got lost or blown up in World War One, there was a large enough reported mintage of 116,997. Allegedly there are an unknown mintage of proofs this year. The mintage for the years around it are over 200,000 each, but, I have never seen a 1913 or 1914.
I have only seen one other example appear out there, raw, on MA Shops, and it is brush-cleaned. 1849 is the last common date until 1917, and, like this coin of 1916, there are only 1 or 2 examples of the smattering of dates available from 1849-1917 at NGC in any condition.
The Dutch were fighting back the Germans who already occupied Belgium and Luxembourg to the south.