Well, that certainly is an odd one !! Can the metal cap on top be removed ?? Can you do that please or if it is made together can you take it off so we can see the lamp itself ?? Have you looked at the bottom for a name could possibly be around the electrical socket or inside the metal cap. Can you take a pic of the top cap so I can see the pattern ?? It isn`t clear in the current one !! Are you sure
this is how it was originally ??