If you have a friend who feels the stigma of being born on the 13th, this is a card to make them feel as special as they are. A long-haired Edwardian girl holds a huge medallion with the number 13 on it. The French text declares this to be a lucky charm. Although I can't translate the text smoothly, it refers to loving a good heart and wishing you happiness.
Written verso, but not postally franked, I'd guess-timate this card is circa 1904-1919. Size: about 3.5 by 5.5 inches. Minor specks, worn corner tips, but overall fine condition. No creases.
Another Lucky 13 postcard is listed here: http://www.rubylane.com/item/274812-7810/Lucky-13-French-Postcard-Edwardian-Boy