Watch List notes:

(g) MS60 | The Mašek Collection of Czech and European Gold Coins | Yugoslavia, Alexander I (1921-1934), Countermarked 4-Ducatu, 1931, conjoined busts left, Corn countermark at end of legend, rev. Imperial double-headed eagle, edge milled, 14.04g, 12h (Fb. 4; KM 14.2), adhesive and iron-stained and subsequently conserved by NGC, otherwise brilliant, extremely fine, in NGC holder, graded MS60 (Cert. #6135289-004)

Provenance
The Mašek Collection of Czech and European Gold Coins