This is a vintage Tensor electric articulating arm desk lamp model 5975.
The lamp is gray metal with a black NA-ALL 15 amp, 125 V plug beside the cord, and an on-off, lo switch on the front. It uses an 1133 bulb which is included and works.
With the arm fully extended it measures about 19" tall, collapsed it measures 4.5" tall, 9" long, and 4" wide.
The lamp is in good pre-owned condition with wear from use.