THERE ARE FOUR  TWEETERS.  TWO WERE BUILT INTO THE CABINETRY AND HAVE ONLY GRILL AND BEZEL. THE OTHER TWO WERE MOVABLE AND SOMEWHAT EXTERNAL AND HAVE WOOD/LAMINATE FINISHES.

TOP TO BOTTOM SERIAL NOS ARE 60187, 60183, 50304, AND 50305

THE GRILLS AND WOOD BEZELS