Nice Vintage Corning Ware dish Iris and lid, now retired, 1 quart casserole dish. The lid has 2 corners with glass that was somehow shaved off but is completely smooth to the touch (see pictures).  The dish itself is in wonderful condition. 
Measurements are:
8¾" with handles width
7" without handles width
2" deep
This dish is marked Corning Ware, which was the company's name up until 1998. After 1998, the company's name was changed to the single word of CorningWare.