Tulip for lamp art deco - frosted glass lampshade cup 11.5x15

This beautiful lamp tulip is made of molded and frosted glass. Flared in shape, this cup is decorated with a molded relief and is wavy at the edge. It serves as a lampshade diffuser on the old metal lamps and small chandeliers of yesteryear. It measures 11.5 X 15 cm and has a base of 5.5cm in diameter. I report traces of use.