This is a Hinks’s Brass Duplex burner Oil Lamp, complete with 4 inch shade holder, circa 1890s. Measures 7&1/2 inches tall, 4&3/8 inches wide at the base, and 4&3/4 inches wide at the widest. Old original brass patina. Has the 2 black glass knobs marked Hinks’s Patent Duplex on the bayonet burner. A great lamp font-fount to finish off your hanging lamp, sconce, banquet lamp. Thank you for your business!