Vintage Blue Cornflower Corning Ware Dish P-9-B 9 With Lid June 21, 2024 | Filed under vintage This vintage Blue Cornflower Corning Ware casserole dish is a P-9-B 9 with lid. The blue cornflower pattern on a white background is a classic antique look. This is pre-owned and has markings, please see pics. Let me know if you have any questions!