Vintage space age opaline ball waterfall ceiling light from the 70s by

A vintage space age style waterfall pendant ceiling light by Richard Essig, dating from the 1970s. Composed of three opaline globes with a red plastic top, it is in very good condition despite some black marks on the globes (see photo). Each ball measures approximately 14cm in diameter, and the ceiling light is 90cm in height, adjustable.