Watch List notes:

(g) NGC MS64 | France, Third Republic, Gold 20-Francs, 1908, Paris, security edge, 6.45g, 7h (Fb. 596a; KM 857), some very faint surface marks, otherwise with an attractive lustre, good extremely fine, in NGC holder, graded MS64 (#3589884-003).
https://www.ngccoin.uk/certlookup/3589884-003/64/
Estimate: £300 - £350