This is an original vintage oil lamp from the 1960s, signed by Tiffany

An original signed Tiffany Oil Lamp with an art glass shade is a rare and exquisite piece of decorative art from Tiffany Studios. 

The art glass shade is the centerpiece of the lamp, made from hand-blown glass that exhibits vibrant colors, unique textures, and often iridescent finishes. Tiffany Studios was famous for its Favrile glass, a type of art glass developed by Louis Comfort Tiffany that is characterized by deep, rich hues and an opalescent sheen. The shades are often decorated with abstract or floral patterns, which come alive when illuminated by the lamp's soft glow.

The signature, typically found on the base or the shade, authenticates the piece as an original Tiffany work. Common markings include "L.C.T.," representing Louis Comfort Tiffany, or "Tiffany Studios New York." These signatures are crucial for collectors to verify the authenticity of the lamp.