Watch List notes:

Netherlands 1 Ducat 1831 St Petersburg Mint. Imitating a gold Ducat of Willem I Rare Russia 1 Ducat 1831. Russian Empire time of Nicholas I (1826-1855). AV 1 Ducat. In the types of the Netherlands trade coinage. St. Petersburg (with the marks of Utrecht) dated 1831 (though struck through 1867/8). PARVAE CRESCUNT• CONCORDIA RES knight standing right holding sword and bundle of arrows; sword and caduceus (privy mark and mintmark) across upper fields date across lower fields / MO• AUR• REG• BELGII AD LEGEM IMPERII• inscribed within ornamented cartouche. Gold 22.73mm, 3.47g. VF
Friedberg 161. (date unlisted); KM-50 (under Netherlands). RARE