VINTAGE Pyrex Yellow 503 Refrigerator Dish

This sunny yellow dish moved from Aunt Nen's house to our house after her passing- I'm not sure what happened to the other pieces of the set. Momma had several of these sets in clear Pyrex- she hated Tupperware- and I have and used all of those. This is the only color piece that as survived. There are a couple of small discolorations that can be seen in the photos- they are actually more obvious in the photos than in real life. I love this piece but I'm hoping it can find its colorful brothers and become part of a complete set once again!