This one's from Gelderland province - as denoted by the GEL to the right of the soldier's head. Not a scarce date or mintmark, but still interesting.
The pitting you can see in the field worries me. It's either been badly cleaned, or corroded from being either buried or sunk in seawater. When you say you "came upon" it, do you mean found, as in underground, like with a metal detector? That could explain the appearance.
The rough, pitted surface might even be a sign that it's a fake, though I don't think fakes of these coins are commonly seen - forgers normally target popular and well-trusted coins, and "lion dollars" were neither.
According to my old catalogue, it's still worth more than it's bullion value - which is uncertain, because the fineness of these coins wasn't very tightly controlled. CV at least $25, maybe up to around $50 if the condition is actually better than appears from the pics.