This is a thaler from the issue of August III for Saxony. With his titulary as King of Poland and a large four-field shield with the coats of arms of the Polish-Lithuanian Commonwealth on the reverse.
Striking because this denomination was minted in Dresden with stamps of larger diameter, and these coins are wider than the thalers from the issue for Poland (the so-called Banco-Taler).
Coin with preserved natural surface mint luster. In patina. With very nice detail.
Type minted between 1737 and 1755, with a hook mark and the initials of Friedrich Wilhelm ó Feral (mincmaster of the Dresden mint), and a Saxon 27 field shield.