1910 20 Frances Rooster Gold Coin 18K Pendant

1910 20 Francs .9000 gold fineness, weight approx. 6.4516 g (without the pendant). The pendant has makers marks/perhaps karat weight but can't make them out. Most likely French. The pendant tests at 18K. 7/8" diameter. 7.2 grams (in pendant) Was removed from a charm bracelet but in good preowned condition.