Antique Sarreguemines Cluny serving platters

Very rare French antique Sarreguemines Cluny serving platters.💙 Trademarked cobalt blue and yellow floral geometric design. Believed to date from 1875~1900 from stamped underside. All four platters have been stamped. Large measures 10“ x 12“. Small measures 7.5” x 10”. **Some crazing and staining are present, few chips to underside of one large platter. All visible in photographs. **Please message me with any ?? or for additional pics ! ** HEAVY ** *Personal family heirlooms ❤️ *Cross~posted