Watch List notes:

(g) NGC MS63 PROOFLIKE | The Mašek Collection of Czech and European Gold Coins | Austro-Hungary, Franz-Josef I (1848-1916), Ducat, 1912, Vienna, laureate head right, rev. Imperial double-headed eagle, 3.50g, 12h, edge milled (Fb. 493; Herinek 181; J.344; KM 2267), stained but conserved by NGC, otherwise lustrous, extremely fine, in NGC holder, graded MS63 PL (Cert. #6135187-004)

Provenance
The Mašek Collection of Czech and European Gold Coins