VINTAGE PYREX “BIG BERTHA” 4-QUART CASSEROLE W/ LID. GOLD BUTTERFLY – #664 – 1970s. This Pyrex casserole is very large and heavy and has its original glass lid. It appears to have been used only rarely. It has one minor scratch (see photo). There is an unusual manufacturing flaw on one of the white flowers on one side. The white design appears to have been smudged before firing. This flaw does not affect the functioning of the dish. Please review photos and ask any questions before purchasing; we will be happy to answer them.