Chicago Mosaic Art Nouveau Lamp Base, 1900s for Antique Slag/Stained Glass Shade

Early 1900s Large Metal Lamp Base with 3-Socket Cluster, attributed to Chicago Mosaic (unmarked). The lamp needs to be rewired/restored, although the cord looks like a recent replacement. The base is cast spelter with the original “bronze patina” surface that is showing some rubbing wear. Needs a good cleaning. Measures about 22″ tall with an 8-1/2″ base.