old white milk glass torchiere reflector, light diffuser lamp shade, vintage replacement

Vintage translucent white glass reflector shade, 6" in diameter across the rim, 5" in height, 2 1/4" at the fitter. This isn't marked that I could see, though is probably a Rembrandt or Stiffel shade? It's in very good condition, some slight roughness to the rim, but no chips or cracks.