I remember years ago in the back of SOF magazine there was a company that sold some crazy watches, one watch had a garrote that unscrewed from the crown and then pulled out like a 12” wire.
Another one had a small blade that popped out of the side at the push of a certain button.
They were pretty cool looking but expensive at the time (I was only like 15 or something I think).
Would be cool collectibles for sure these days. Wish they still made them.