Watch List notes:

(g) NGC MS62 | The Mašek Collection of Czech and European Gold Coins | Czechoslovakia, First Republic (1918-1939), Ducat, 1928, Kremnitz, St. Wenceslas standing facing, rev. rampant Czech Lion in Slovak shield, edge milled, 3.48g, 12h (Fb. 2; M&CH CSR1D-005; Valovic CSD2; Novotný 16; Schlum. 24; KM 8), stained but subsequently conserved by NGC, otherwise lustrous, much as struck, a key date of issue with a reported mintage of only 9,729 struck, in NGC holder, graded MS62 (Cert. #6135187-009)

Provenance
The Mašek Collection of Czech and European Gold Coins