This is a Corning Ware 4 Qt Buffet Server B-4 in all white. This is the largest size buffet server made by Corning. It could also be used as a dutch oven. The dish is all white with a white lid and a white ceramic knob. The buffet servers came with either black bakelite or white ceramic knobs, both are correct. It is in excellent condition with no damage other than a few minor scuffs.