This shape pointy knob makes this an earlier style lid. Marked: Pyrex, 626 C (C- D) and would fit a round 9-7/8 inch flange dish; measures 10-1/8 inches end to end of glass. Condition: used, vintage, no chips or cracks, few areas of manufacturing flaws inside the glass, straw marks and the like, common with old glass. I think this is a cover for a 3-Qt. Casserole. Circa 1927