I’ve something quite unusual and can’t seem to find any info on it at all, only speculation.
I’m affectionately calling it “murder cage.”
Theres a metal trap door at the bottom with glass tubes, some of the tubes have double sided metal needles. The tubes connect to the outside, as if something triggers them to shoot out. I’ve yet to try and open it, quite honestly it’s a bit freaky! The cylinder in the center has a threaded hole, as if something is inserted to activate it. Unsure. Any info whatsoever would be fantastic. Thoughts?

I believe it could be for a game (forced or otherwise) similar to Russian roulette, but with shooting needles. Given that they’re rigged to go in either direction you wouldn’t know which side they would come out of. Possibly poisoned? Assassination? Booby trap?