Tiffany Harvard Desk Lamp Identification

I just acquired this lamp which did not come with the original burner. I am looking for the original burner used in this lamp. Based on pictures that I found of Wild and Wessel lamps made in about 1872, I am led to believe that Tiffany imported them and stamped their name on it. So I am guessing that the burner should be a Wild and Wessel Vulcan burner. I have not been able to find a picture of a lamp like mine (without the adjustable shade). I did find this one: http://media.liveauctiongroup.net/i/5559/8528652_1.jpg?v=8CBB6669F542D20 which gives me a clue. I also need the chimney and Shade hopefully dated around the same time as the lamp. I do not know when Tiffany sold this lamp. Any information would be appreciated.