Corning Ware Cornflower Blue Square Casserole / No Lid ( 2 1/2 Quart ) ( P-2 1/2-B ) Circa: 1957 - 1988 Size: 2 1/2 Quart Collection: Cornflower Blue Pattern: Centura, Blue Floral On White, Coupe Shape Part Number: P-2 1/2-B