Antique Slag Glass Table Lamp with LIGHT-UP BASE Circa 1920. A early lovely 20th century slag glass table lamp. The 18 shade has slag glass panels in butterscotch and multicolored panels along the lower border in browns, blues and purples. The shade sits on a matching slag glass base, which lights up internally. Condition: Works, Turns on. The shade is free of cracks. One of the slag glass panels has a crack, one of the metal pieces has bent to it, metal base also has bent to it.