Crown coin, Ducat, 1766, Warsaw; Av: Figure of the king in coronation attire, date on sides 17 - 66, around inscription: STANISLAUS AUG D G REX POL M D L; Rw: Five-line inscription in an ornamental shield MONETA / AUREA / POLONI / AD LEG / IMPER surrounded by ornaments, at the bottom the letters F S (of the mintmaster of the Warsaw mint in 1765-1767 Frederick Sylm); Beyer 898, Fr. 103, Kaleniecki s. 528, Kop. 2499 (R3), Kurp. 316 (R3), Parchimowicz SAP 39.a, Plage 420, Berezowski 125 zl, Tyszkiewicz 40 mk, known from the magnificent collections of the most outstanding Polish collectors: Chelminski pos. 1427, Chomiński pos. 681, Czapski 5324 (R3), Frankiewicz pos. 857, Karolkiewicz pos. 2465; gold, 3.47 g; unevenly cut disc at "12 o'clock", very rare coin and nicely designed by the greatest medalist of the Stanislawski era, J. F. Holzhaeusser.
