Very rare and highly sought after Dentiscope Surgical lamp dates from 1915. These lamps were very special and expensive back in the day and replaced the gas type lamps. These early electrified lamps have a focal lens that can be adjusted via a small knob. It opens and shuts like a camera iris to fine tune the beam. Light comes from a small bulb inside and passes through two focal lenses. Takes standard type bulbs but of the shorter type. The lamp turns on and off in the back of unit and the wiring and bracket have been adapted to the body. The bracket is a period accordion wall mount and has an aluminal pivoting arm. The only thing to note is the shade has some stabilized cracks.  The shade is very delicate and shows cracks in several places but is still on the piece. You can see from the pictures it does not affect the look when on or off. Main Lamp body is 14" with 6" at its widest point.