Watch List notes:

The Jean-Marie Vanmeerbeeck Collection of Belgian Gold Coins | Belgium, Leopold I (1831-1865), Proof 20-Francs, 1835, Brussels, by Joseph-Pierre Braemt, laureate head right, rev. value and date in wreath, italic incuse edge lettering, 6.46g, 6h (BFM 152; KM A23.1; Fb. 404; Dupriez 112), toning spots in otherwise brilliant but somewhat hazy fields, some friction to highest points, otherwise extremely fine, extremely rare

Provenance
The Jean-Marie Vanmeerbeeck Collection of Belgian Gold Coins