VINTAGE CORNING WARE CORNFLOWER COVERED DISHES 3 DISHES WITH GLASS LIDS. Based on the below research. Corning ware 1 QT P-1-B Made in USA a 1 quart dish with lid 21 PYREX A7C no chips or cracks has a little wear on the bottom edge from coming in and out of the oven. Corning ware P 1 1/2-B 1 1/2 QT Made in USA For Range & Microwave 1 1/2 quart dish with lid B-12 has minor wear on the bottom from coming in and out of the oven. The lid has a slight manufacturing flaw in that it has an indent in the lid edge. It has a chip in the top of the lid edge top and a chip in the bottom edge on another corner. Neither of them go all the way through to the other side. Corning ware 1 3/4 QT P-1 3/4-B Made in USA 1 3/4 quart dish with lid A PYREX A7C has minor wear on the bottom from coming in and out of the oven. Another site I researched stated these particular codes were discontinued in 1972. We use a high resolution camera to give a detailed description of the items. With or without small Cornflower.