This is a large and heavy handed and thick dish when picked up. No signature mark found but I am leaning towards a studio piece with a long gone sticker. My favorite part of it is the bottom is a solid cobalt blue so on a glass table or a lighter color it will cast a blue shadow. Its rather large (16" across) and has a low rise (2"). The design, in my opinion, reminds me of a 60's or 70's style. It just dying to be covered with candy to be served at a party. There is 3 minor wear spots shown in the photos. Some black specks on one edge and 2 surface ships on the underside. No other cracks or issues. In my opinion this would make a great display dish in any living space with a retro style.