This nickel plated brass kerosene lamp is a Rayo brand, manufactured by Bradley & Hubbard from the late 1800s to 1905. It's in poor condition, reflected in the price, and has been transformed into a Christmas decoration with a cluster of greenery, ribbon, and jingle bells. The cluster was attached with rubbery hot glue and is easily removed - just peel it off.
The lamp stands about 11-1/2 inches to the top of the gallery. It has a non-original glass chimney. There's a significant dent to the reservoir below and to the left of the cap, and several smaller ones. The lamp needs cleaning, and there's some verdigris along the upper edge of the reticulated base. The Christmas spray is placed to hide the vast majority of the issues.