You are looking at a vintage Pyrex 2 1/2 quart round mixing bowl, in the primary colors pattern, this being green.  The bowl has no cracks or chips; has heavier utensil marks inside and the green on the outside is faded, but fully intact.  Model would #403 (not on the bowl).  Measures 8.5" wide at the top; stands 4" tall.  Bottom reads:

  • T. M. REG. 
  • PYREX
  • U.S. PAT. OFF.