FAIENCE WARE - FRENCH PLATE ?

HERE FOR SALE IS MY "FAIENCE" WARE PLATE, FRENCH AND I THINK OF SOME AGE. THE REVERSE OF THIS PLATE SHOWS THE MARKS AS IN THE PICTURE. THERE IS ALSO AN IMPRINTED MARK OF WHAT LOOKS LIKE A RECTANGLE WITH A CIRCLE INSIDE AND THE LARGE NUMBER "3" AND A SMALL NUMBER "7" THIS IS A LOVELY COUNTRY PLATE FREE FROM CRACKS , CHIPS ETC AND IS SUPERB.