It has been electrified without damage to lamp. You can remove the added electric to return to original self. I was told it belonged to a sea captain. I really do not know much about this lamp. It does have on a knob the words Lampe Verllas?
Not sure on second word. I was told this is the original milk glass shade. The item "Rare Antique Victorian Chandelier Hanging Oil Lamp Original Milk Glass Globe" is in sale since Tuesday, June 5, 2018. This item is in the category "Collectibles\Lamps, Lighting\Lamp Repair, Refurbishing\Parts". The seller is "cherel6" and is located in Boonville, New York.