Large flake glass pendant lampshade in white with orange and green flakes, c.1930s-50s

A large c.1930s-50s pendant lampshade, in white flake glass (shiny to the exterior) with scattered orange and light green flakes, and measuring approximately 18cm in height and 17.2cm in diameter at the base.  The lampholder hole measures approximately 3cm in diameter, and thus the shade will fit a standard UK plastic pendant lampholder (although care must be taken that the ceiling rose fixings, flex and connections are sufficiently strong before hanging it, as it is unusually heavy for a pendant shade).  There is some roughness to the lower edges, including a couple of large nibbles or small chips to the inner edge, whilst there is some nibbling and slight roughness around the lampholder hole (not of course visible when the shade is hung), together with numerous paint specks and other slight marks and scratches; the glass contains many small air bubbles and other irregularities.