Rare 60s Vintage Corning Ware Blue Cornflower Casserole Dish 1 3/4 QT P-1 3/4-B July 8, 2023 | Filed under rare Here we have in Wonderfull Original condition an Authentic. Rare 60s Vintage Corning Ware Blue Cornflower Casserole Dish 1 3/4 QT P-1 3/4-B. No cracks or chips on the dish or lid. The stamp on the back dates this dish from the 1960s.