1950s ceiling light

Ceiling light in cut frosted glass (it is not a very common opaline at that time) and shiny aluminum for the metal part. It was in the entrance of my grandmother's apartment. This object in its own juice is in very good condition, the glass is slightly chipped in the part which is screwed into the support but this is invisible since it is hidden in the metal part. The ceiling light is 50 cm maximum which can be reduced to 46 cm thanks to the adjustment screw.