Quon Quon vintage green leaf serving platter Sage color

Quon Quon vintage green leaf serving platter. Sage color. Marked on bottom with QQ and some other marking that is smudged. The QQ stands for Quon Quon, a Japanese pottery. Measures 15 inches long by 10 inches wide, 2 inches tall. There are 3 small holes in a triangle shape, you can see them in the second photo. Do not know what they were for. Item is not chipped or cracked. Does have some surface wear, could just need a good cleaning. It was stored in the bottom of a box with a piece of bubble wrap covering it, bubble wrap was slightly stuck to the surface when I unwrapped the bowl.