VTG Pyrex reverse primary colors mixing bowl set of 4

hard to find Pyrex mixing bowl set. reverse primary colors. set of 4. made between 1968-77. included blue 401 (1.5 pt), red 402 (1.5 qt), yellow 403 (2.5 qt) and green 404 (4 qt). the red , green and yellow bowls have tiny scratches on the sides of when held up to the light. see pictures. no chips or cracks