A clear glass lid for your vintage Pyrex 500 series 1-1/2 pint fridge dish number 502, which was the middle size dish in the set. It will fit any vintage Pyrex colored 502 dish regardless of pattern, from the original 1947 Primary colors to the 1979 Autumn Harvest lines. The Oven to Refrigerator sets were all discontinued by Pyrex in 1981.
The lid measures 4-1/4 by 6-3/4 inches. It has a small area of tiny fleabites or roughness to the interior rim edge.