This antique metal desk lamp was my grandfather's. From that, the best I can do for age is to guess it was from the 1940s or 1950s. But honestly is only a guess. It's vaguely bell-shaped. Has some blemishes and faded areas in the shade and base. The shade tilts in either direction. Overall weight is heavy. The base provides the heft in the weight. Not sure if the shade is brass or not. It measures 2 ft tall and at it's widest in the shade is about 10 inches.

2 ft tall x 10 inches wide in shade.