Fine Early 20th C. American Slag Glass Lamp Shade Copper Top

Fine Early 20th C. American Slag Glass Lamp Shade Copper Top. From a antique building in Lakeland Fl. Point to point across from the bottom is 15 1/2″ and 13 1/2″ across from flate panel to flate glass panel. About 8 from bottom of panel to bottom of copper 90 degrees. About 10 from bottom rim to top of copper dome 90 degrees. Some deterioration and pitting around lower rim see photos.