Here is my example of Bolte & Weyer Co. Chicago Illinois Hollow Wire lamp. Identification credit to Neil McRae The lamp is complete and has the original globe. Would run now if I the jet was cleared & attach to a HW pressure tank. Pricker was rusted off and jammed into the jet at the moment. I suspect the brass has been cleaned by others as may have been oxidized to a dark finish as this would fit the colorway of the Arts & Crafts period to which the lamp belongs. Circa 1905-1910