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