Delft Blue T. G. Green and Co Blue and White Platter

I’m sorry I know very little about Delft Blue, this one is marked TG Green & Co Delft. This is a great addition to your country kitchen or cottagecore life. Condition: Good overall condition with no stains, no cracks, no chips, edges have some dark discolouration but not sure if it’s dirt or what but I haven’t tried to clean it, cuz if it doesn’t go in the dishwasher, I’m lost.