Brass industrial vintage look drafting or desk lamp with an adjustable arm and a helmet shade. This is a newer piece, probably from the 1990s. Not an authentic industrial vintage piece, but nice to give your room that look.
It measures about 6" across the shade, 27" long on the arm and extends to about 40" when measured straight up.
There's a heavy cast iron weight in the base and tarnish spotting to the brass.