Featured Plume and Atwood "Double Harvard" Oil Lamp

I found a converted oil lamp (to electricity) in my grandfathers house. I have done some research on it and found that it is a double harvard lamp made by Plume and Atwood but that is all I really know. I am in between polishing up the piece and putting it on my desk or selling it. I was wondering if anyone knew what kind of shades would go on it and if anyone knew a value on a piece like this?

 

My guess is that they would have been 'fitter' type chimney shaped glass shades, but hopefully a member who actually has some knowledge will be able to give better guidance.

 

Just do a google search for "double harvard lamp made by Plume and Atwood" and you'll see a number of pictures with shades, and links for sales. They seem to average in the 1-2k price range from a quick look on worthpoint. Yours appear to be missing the pieces that actually hold the shades.

 

The galleries on the top of your burners are upside down. Did you sell the lamp?