Question about Apollo lights

[RebelRAM]

In a lot of the old NASA video footage from the Apollo missions there is a small flashlight used by the astronauts. Does anybody know much about these lights? How many were made? What battery type they used? etc?
Here is the only info I have been able to find about them on the net so far
http://www.apolloartifacts.com/2008/01/brass-flashligh.html

 

[Marduke]

https://www.candlepowerforums.com/threads/147836

 

[Dances with Flashlight]

Thanks for these links. This is fascinating stuff.