Vintage Pyrex Blue Small Bowl 5 Inches Primary Colors Glass Mixing

Pyrex PRIMARY BLUE Small Nesting Mixing Bowl Vintage. Bowl is in good overall condition with some usage and aging wear as seen in photos. Opening is approximately 5 & 1/8 inches in diameter. I do not know if this bowl is part of the classic Pyrex 4 bowl primary colors set or a separately made Pyrex bowl. Please examine all photos. Message with any questions or for additional photos.