Vintage white ironstone china bowl... this is shabby, but such a nice large size. Measures about 10" across the rim, stands 4" tall.
It's American made, an antique from the earliest years of the 20th century. Mark is K T & K (Knowles, Taylor and Knowles).
It's showing finish wear and scratching, a lot of staining (we've never soaked it, though I know some dealers soak china it's not something we do). There's tight hairlines, very discolored. Please see photos.