1815-R, France, Louis XVIII (in Exile). Scarce Gold 20 Francs Coin. London mint! Scarce 1-Year Type struck during his Exile in the UK. Mint year: 1815 Engraver: T. Wyon. Jr. Mint Place: London ® Denomination: 20 Francs References: Friedberg 531, Gadoury 239, KM-707. R! Material: Gold (.900) .1867 oz ASW Diameter: 21mm Weight: 6.41gm Obverse: Bust of Louis XVIII right. Legend: LOUIS XV ...