I've got a couple of Premier caplamps too, restored them a few years ago. I occasionally use them camping but many years ago learned to cave with them.
Love the smell of carbide.
When we ran out of water we used to have to pee in them to get the water that the reaction to produce acetylene gas requires.
They also burn incredibly hot, at up to 1200 degrees C in the right conditions. Certainly left some interesting scars whilst climbing electron ladders.