Watch List notes:

POLAND. Augustus III, 1734-1763. 10 Thaler or Double Augustus 1756 EC, Leipzig. Obv. D G AVGVSTVS III REX POLONIARUM. Crowned bust right. Rev. SAC ROM IMP ARCHIM ET ELEC 1756. Coat of arms. KM 975; Fr. 2857. AU. 13.25 g. XF-AU
Ex. Chaponnière & Firmenich SA auction 10, 21 October 2018, lot 457.
Signed by Ernst Dietrich Croll, mintmaster in Leipzig 1753 to 1756. He also ran the mint of Dresden from 1763 to 1778. Rare in this condition.