Watch List notes:

(x) Poland, Sigismund III Vasa (1587-1632), Ducat, 1599, Danzig [Gdansk], SIGIS 3 D G REX POL ET SVF D, crowned bust right, wearing ruff, rev. MONE NO CIVI GEDANESIS, coat-of-arms, Chi-Rho above, edge plain, 3.50g, 6h (Kopicki 7521; Fb. 10), creased and lustrous, fully round, a bolder very fine, extremely rare

Provenance
The George Webber Collection of World Gold Coins