Corning Ware Cornflower Blue Square Casserole / No Lid ( 1 1/2 Quart ) ( P-1 1/2-B ) Circa: 1957 - 1988 Size: 1 1/2 Quart / 7" Collection: Cornflower Blue Pattern: Centura, Blue Floral On White, Coupe Shape Part Number: P-1 1/2-B / ( P-1 1/2-B ) Version Has Rounded Bottom Corners / ( A-1 1/2-B ) Version Has Square Bottom Corners