RARE Vintage 20th Century Vintage Chinese Square White Blue Porcelain Bowl

My parents were stationed in Asia after WW2 and my mom shopped and brought home many beautiful things. This is very heavy and has a backstamp under the glaze with artisans name. I estimate it was purchased in the 40's -50's but do not know its age when purchased. It is really a beautiful piece for display or center of a hall chest or china cabinet. Great centerpiece for the table. Found previous sales of these around $70 but have only found one.