SET 10 Vintage Corelle Summer Blossom Cups, Bowl USA.

SET 10 Vintage Corelle Summer Blossom Cups, Bowl USA. 4 cups, 5 pour cups, 1 bowl. One cup has black on it, not sure what it is. I don’t know if it will come off or not but hen it’s cleaned: Some of them have a few spots but I believe they will come off with a good cleaning. I didn’t notice any chips or cracks. They are all marked Corelle. Please refer to all pictures and feel free to ask questions.