This is a classic piece of Mid-Century Modern lighting. Specifically, it is an Arc Floor Lamp (often referred to as a "Fishing Lamp" due to its bowed shape).
Based on the design features in the image, here is the essential information:
Product Overview
Style: Mid-Century Modern / Space Age.
Material: Chrome-plated steel (high-polish finish).
Key Features
Arc Arm: A long, sweeping curved neck designed to provide overhead lighting without the need for ceiling suspension.
Dome Shade: A "half-moon" or hemispherical pivoting head that allows for directional downlighting.
Adjustability: The arm is often telescopic or height-adjustable at the base joint, making it ideal for positioning over a sofa or a dining table.
Base: A heavy circular metal base provides the counterweight necessary to keep the long arm stable.