I have been looking for a 1516 half groat to complete my OFEY for Zygmunt (Sigismund I) of Poland. It is not a rare coin, but does not tend to come up often as a single coin (it sometimes appears in lots with other dates of the same type, which is not helpful when I have those other dates).
When I saw this coin advertised as a 1516, I jumped on it, even though I wasn't completely sure the last digit in the date is indeed a 6.
Now with it in hand, and having looked through my Early Lithuanian Half Groats
coauthored by one of our members, I am still not sure. Most varieties of this date just have the two digit date 16. The varieties with the full date all have a more pronounced and upward pointing "stem" on the 6. But 1510 (which has the same knight and the same eagle as 1516) also does not seem to fit. The zero is generally quite large and open, except for one variety with a small zero (#37), but this variety had a colon (:) after the date.
So, I am hoping @giedrius will get a look at this and give an opinion, but anyone else feel free to chime in