Directly below the glass panel is a heavy BRASS lever that controls switch mechanism housed in the unit. The indicator arm is activated by means of a relay in the rear of the unit. This unit measures 12" Deep x 5 3/4" Wide x 9 3/4 High (Measured at the front).
The body and removable top cover are made of CAST IRON with many layers of grey paint. The top cover can be locked by means of a fixed hasp at the rear of the unit. I don't know what the operating voltage of this unit is. The item "Vintage Railroad Semaphor Indicator" is in sale since Monday, March 9, 2020. This item is in the category "Collectibles\Transportation\Railroadiana & Trains\Hardware\Lanterns & Lamps".The seller is "tao8801" and is located in Massapequa, New York. This item can be shipped to United States.