Watch List notes:

(g) NGC AU58 | France, Second Republic, Gold 20-Francs, 1850 A, Paris, raised lettered edge, 6.45g, 6h (Fb. 566; KM 762), bright and lustrous, near extremely fine, in NGC holder, graded AU58 (#3591351-004).
Provenance
Heritage, 'Weekly Auction' 231311, 21 March 2013, lot 63055 - $340
, ,
https://www.ngccoin.uk/certlookup/3591351-004/58/
Estimate: £300 - £350