Watch List notes:

Foreign Coins, Switzerland, Bern, 4 ducats, undated (16thC), struck from dicken dies, bear l., double-headed eagle above, rev. legend in seven lines, wt. 14.13gms. (HMZ.2, 172; cf. Fr.117; cf. Richter 1-144), certified and graded by PCGS as About Uncirculated 55, extremely rare
The only example graded by PCGS.
(18000-22000 GBP)