I was sure I already had this posted. I knew that I already photographed the coin in June, and, as far as I can tell, cropped the photo in the CCF Image Optimizer shortly after.
(I actually thought that the cropping happened in December, but nope, also June.)
But then I checked and realized that I just apparently never got around to actually
posting it.
So, um, here it is?

11x10 mm, 0.56 grams. That thing's tiny.
It's also my last 2019 purchase (that I could find, at least) that could be relevant for the top 10, and had not been either successfully identified, or, if not, already posted for ID on CCF.
So I guess that's it for the "remaining unidentified 2019 purchase" series.
(The first unidentified 2020 purchases should follow shortly, but aside from perhaps the very first, they probably mostly wouldn't be labelled as such explicitly.)