The innovators at Hadrill & Horstmann, a UK design firm responsible for some of the mid-century's most prized lamps, once created a barrel-weighted counterbalance lamp known as a "roller." Ours is a replica of a 1940 original, the Pluslite. Used by jewelers to inspect their prized collections, it comes complete with an adjustable height mechanism and a foldout magnifier to bring details into view.