Watch List notes:

Mainz, Emerich Joseph Breitbach von Bürresheim, Jubilee of Franz Ludwig von Kesselstadt as Cathedral Librarian of Mainz and Trier, 1772, silver medal, by A. Stieler, twelve-line inscription on tablet, with further inscription around bearing chronogrammatic date, rev., Bishop kneeling before altar, 43mm, 29.14g (Prinz Alexander 844), extremely fine

Estimate: 300-350 GBP