A German made Zeiler 4640 flashlight. It has a large domed glass lens as well as a signal function. There are a red and blue shifter to change the color of the light. There is still a large old style empty battery inside. The black knob on top needs to be pushed down and twisted to lock in the on position. The bakelite is very clean and in pretty good condition, besides a small chip on the top right corner. I have not tested it and can not guarantee it’s functioning. Just a nice piece to toy around with. On the back a leather strap with which it could be mounted to a belt, seems to be cut of a piece. Measures 13 cm / 5 1/4 inch high.