FIRST you are asking about history..., not if you should use the item at an event.These little candle lanterns are neat, but I wonder if they are correct.
Lots of men bought small alcohol-burner "stoves" in the WW1 trench era. Little pot with a lid and a burner you'd put under it to heat tea, soup, etc. This could be that type thing. I have one that came from a 94-year old guy, whose dad brought back from Europe after WW1.Hi David,
Ah, a period "Pen Light."
Some Juried Events may have problems with them, but even though it is an uncommon to rare style, it certainly could have been made in the period.
As it is, we often have WAY too many "common" things in our camps, especially military camps, to be totally authentic in most campaigns.
This is something I would leave as "Unit Discretion" and if a Juried Event has a problem with them, I would just not use it that weekend.