The set that never was. The Early American (1962-1971) nesting round bowls set did not include a 4-quart. The 404 only existed in a gift set as a cradled casserole with a knob top lid borrowed from the 026 3-quart round casserole, which also happened to fit. The existence of white on brown 401 and 403 bowls suggests Corning may have toyed with the idea of marketing a 4-piece 400 set with alternating color bowls, but it never officially happened.