1964, Luxembourg, Jean (Grand Duke). Gold 20 Francs “Coronation” Mint Year: 1964 Mintage: 25,050 pcs. Reference KM-X#M4c. Denomination: 20 Francs- Coronation of Duke Jean Condition: Minimal contact-marks, otherwise a nice UNCirculated coin! Material: Gold (.900) Diameter: 21mm Weight: 6.47gm Obverse: Bare head of Grand Duke Jean of Luxembourg left. Legend: JEAN GRAND-DUC DE LUXEMBOURG / J. ...