Owner Comments:
Won at an auction in Poland, and reunited with the 1634, 35, 36, and 1642 West Friesland ducats in this collection after hundreds of years away from the mint. I surmise all were engraved by the same guy, Jacob Utenwael (Uyttewaal), active through the 1630s and 40s at the West Friesland mint.
You can see a nice run of 1630s West Friesland ducats in this "Nationalized" collection of the Netherlands here:
https://data.collectienederland.nl/search/?page=2&q=dukaat
NGC has graded one 1637 Holland ducat at AU50 and a Gelderland at MS62. The Gelderland one sold at a Schulman auction June 17, 2021 and I was outbid by about 500 Euros. Those two coins, and this one, are all there are for 1637 ducats of any province at NGC, including in details grades
PCGS has graded an MS62 and MS61 of West Friesland in 1637, and none of any other province of 1637.