Here are a pair of vintage Pyrex 473-B and 475-B straight sided bowls in the Colonial Mist blue color, very nice. Larger has a faint ring around the inside base not sure what caused it but might need some scrubbing. No damage, no indication of time in a dishwasher either finishes are bright & shiny.
Pictures tell the story and are part of the description, please feel free to ask questions.