This small flashlight was part of the astronaut equipment available to the Apollo 11 crew on their July 1969 mission to the Moon.
It is constructed with a brass case, and was operated by rotating the bulb end. It was powered by a small battery and had a small velcro tab to keep it secure in the weightless environment.
Michael Collins donated this to the National Air and Space Museum in 1985.
This object is not on display at the National Air and Space Museum. It is either on loan or in storage.