Watch List notes:

(g) NGC MS63 | France, Third Republic, Gold 20-Francs, 1910, Paris, security edge, 6.45g, 6h (Fb. 596a; KM 857), highly lustrous, good extremely fine, in NGC holder, graded MS63 (#1548740-018).
https://www.ngccoin.uk/certlookup/1548740-018/63/
Estimate: £300 - £350