Watch List notes:

Foreign Coins and Medals, Germany, Hamburg, Free and Hanseatic City, The Great Comet of 1744, silver ducat, comet and starry sky over landscape, rev. WER HAT DES HERRN SINN ERKANNT?, 22mm. (Gaed.1843; Brettauer 2276; Bottcher 236), extremely fine with light tone, rare
The Great Comet of 1744, is also known as the Comet de Chéseaux or the Comet Klinkenberg-Chéseaux. It is official designated as C/1743 X1.
Estimate: 200-250 GBP