have a look here https://en.numista.com/catalogue/pieces84920.html
it says that the mint set coin (BU) is the only one with a mint mark, but in the line under that, the mint mark F still appears.
That's in contradiction to the text, isn't it? Anyway my unc coin has NO mint mark!
You are right Ole. The "F" after the date in the second year line should be deleted, and then the comment after that year line can be deleted too. The comment after the the first year line is clear enough.