Kerosene antique lamp Scovill,Queen Ann,spare VENUS burner,rare

here is a kerosene lamp base(no chimney) marked Queen Ann and Scovill. The screw top is missing. It is about 6" at it's widest. glass fill about 2 3/4" in height. one rough spot at top rim.one 'bracket'is missing at tip. the glass has bubbles in it but aside from the rough patch I did not notice any other chips or breaks. This piece has an unusual inverted 'tube' going into the center of the lamp.see photos for clearer description. I've included another burner pc.,slightly bent that is marked Venus,Dec 10 1867..There is a small wick in the lamp.The brass ring attached to the glass is marked 1878. Thanks for viewing and please ask questions before bidding.

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