French Art Deco, Platinum, 18 K White Gold, Diamond Ring Seven Diamonds Central Stone = 0.05 Carat 14.50 mm long,10.60 Wide Size 7 1/4 Weight 2.1 grams 18 k French Eagle, Platinum Dog Hallmark Pictures are magnified The eagle's head hallmark is commonly seen on French made items of gold since 1838. It represents an item that has tested to be constructed of a minimum 18k or 750/1000 parts gold. The dog's head hallmark on the right is the French hallmark for platinum items that test to be a minimum of 950/1000 parts platinum but was not introduced until 1912. These two together indicate that both metals are present in the piece. The order and orientation of the two hallmarks can provide more specifics on the ratios of the different metals that make up the item, as well. (Consult page 115 of World Hallmarks - Vol. I - Europe, for all the combinations of these hallmarks and their meanings.)