Watch List notes:

Köln, Joseph Klemens Herzog von Bayern, two-thirds taler, 1715, bust right, rev., arms, 17.73g (Noss 634; Dav. 471), the obverse overstruck on reverse (and reverse on obverse) of an example of Noss 632 or 633, with undertype clearly visible, extremely fine and of the highest rarity

Estimate: 1500-2000 GBP