Vintage Yellow Pottery Casserole Dish White Lid.
I do not know the maker of this dish, though I have always suspected it could be McCoy because of the bottom.
One chip on the underside of the lid which I have shown a picture of.
The area where the lid rests on the dish has a groove and is unglazed as it is the dish itself-this makes me believe these two are a matched set because of how they fit together.
This is a heavy dish and has some minor crazing-any other marks are from the manufacture like glaze pops.