vintage white glass diffuser replacement shade, reflector lampshade waffle milk glass

Vintage milk glass reflector shade for an old Rembrandt or Stiffel type lamp. It's 6" across the wide rim, about 4 3/4" tall. The fitter is 2 1/4" across.

This is in excellent condition without chips or cracks. It doesn't appear to be marked at all that we could see.