Unique Old Marble slag glass lamp With Drum Shape Shade

This unique old slag glass table lamp features a historical 18th-century scene. Has 2 curved pieces of marble slag glass in drum shade with finial on top. It has a knob control, The lamp was possibly Manufactured in the 1920s, This original piece stands 14 inches tall with a diameter of 18 inches. The off-white cord complements the overall design of the lamp. Found in old farmhouse. Ive had it for years. Thought to be cast iron with overlay. Needs work but functions as it should. Casts beautiful glowing light!