I recently picked up a lot of two 1638 schillings of the city of Riga under Swedish occupation.
On inspection, one of them is among the 4 listed varieties in Numista, but the other is unusual in that the 38 in the date are in a large font, and the word "SOLIDVS" seems to be spelled with what is a numeral 8 at the beginning (same as in the date). The only reference I have for this type is Numista, which does not mention this variety.
I am aware from posts of one of our other CCF members that minor coins from this part of the world are very rich in varieties in the 17th century, so I do not delude myself that it is especially valuable ... But always fun to stumble across such things (I will add it to Numista when I get a chance).
Another possibility I have considered is that this is a counterfeit, since the small minor coins of his region and era were widely counterfeited in Moldavia (the lot was from a large Polish auction house who I would have expected to catch a counterfeit, as they sell a lot of these).
Edit: Since posting I have found what appears to be another example of this variety of the 1638. So, I will chalk it up to Numista being a bit incomplete (it has now been submitted as a 5th variety for this date, and will be added to the catalog)
Normal legend and date reverse: SOLIDVS C RIGENSIS
38:
Variety legend and date reverse 8OLIDVS CIVI RIGENSIS 3
8 
Posted 10/10/2020 9:52 pm
