Other duplicate detected after moving coin from Polish branch to Lithuanian. Second one got better description.
Maybe delete first one, but it got more details about coats of arms used in reverse.
Technically those ducats/florins had so many variations in lettering that it takes five A4 catalogue pages. 1547-1554 used first iteration of ruler's portrait. Later ones got dude with bigger beard. Maybe that would make two coin variants/pages.
Examples in Lithuanian museum online reference
https://www.limis.lt/valuables/e/805209/2871364?searchId=89321872
https://www.limis.lt/valuables/e/805209/1636142?searchId=89321872