Watch List notes:

(g) The Mašek Collection of Czech and European Gold Coins | Czechoslovakia, First Republic (1918-1939), 'Reopening of the Mines of Kremnitz', Commemorative Ducat, 1934, Kremnitz, by Anton Hám, S CIVITATIS REGIS CAROL DE CREMNICA, praying haloed Catherine right in flower shaped frame, circumscription in hexagonal frame, rev. Mining above and below ground, hallmarked .987 and K punch, edge milled, 3.50g, 12h (Fb. 16; Müseler 69/9; Schlum. 64; KM X14.1), small edge bruise at 11 o'clock and subsequently conserved by NGC, otherwise quite brilliant, extremely fine and very rare, with only reportedly 288 pieces struck, in NGC holder, graded UNC Details ~ Obverse Cleaned (Cert. #6135286-001)

Provenance
The Mašek Collection of Czech and European Gold Coins