Variety with the letters S-T on the sides of Jan Spytek Tarnowski's Leliwa coat of arms, without rosettes at the crown.
Reverse legend is quite worn, which makes it impossible to see the punctuation marks between REGNI and POLO and POLO and the date, which is why we cannot assign the coin to a specific variety in G. Romańczyk's catalogue.
Second year of issue of such a coins.