Corning Ware Blue Cornflower P-19 Meat Roasting Serving Platter 13 x 8.75 in This lot is for a Corning Ware Blue Cornflower Classic pattern platter. It's marked on the back: Corning Ware P-19 13 x 8 3/4 Made in USA For Range & Microwave. It's a wonderful roast meat platter with the wells to catch any juices. It'll work grand to take to the table and serve with. No chips cracks or other damage that we saw.