Stanislaw's monogram under crown, date in fields (1783) / Crowned Polish coat of armsk within wreath, I¢GROSSUS¢REG:POL:M:D:L around, EB below (the Ephraim Brenn of the Warsaw mint). 21mm, 3.40 grams. Mint of Warsaw. KM #177.

Stanisław August Poniatowski (also Stanisław II August; born Stanisław Antoni Poniatowski; 17 January 1732 12 February 1798) was the last King and Grand Duke of the PolishLithuanian Commonwealth (176495). He remains a controversial figure in Polish history. Recognized as a great patron of the arts and sciences and a supporter of progressive reforms, he is also remembered as the last king of the Commonwealth, the one who failed to prevent its destruction.