Unidentified Lamp

Picked up this lamp this morning at an estate sale. Just about everything in the house was pre-1970's so I'm sure this fits that bill... I think it's from much further back. It's hard to see but there are two thin gold lines around the base. The lamp itself is hollow with only the cord going up the middle. The portion that holds the bulb screws onto the body of the lamp. The lamp body feels like glass while the finial feels like plastic. Any help you give will be greatly appreciated!