I agree with j1m.
This type with reverse legend SOLID REG POLO (date followed by dot) was struck 1663 - 1665. Here is the Numista listing for 1665:https://en.numista.com/catalogue/pieces119299.html
Again, as pointed out by j1m, Numista lists each date/mint combination separately, which is helpful in some cases (finding an obscure mint like Oliwa or Brest), but is more confusing than helpful for the Ujazdow mint, which struck the type continuously for most of the 1660s
Edited by tdziemia
12/08/2022 08:02 am