Ok I am not sure if there is a thread for this already but here it goes.

What is the most weird,unique,special,rare,oldest or even most dangerous, item you own.

Mine is a 1940's U.K. civilian gas mask which looks like this...

I have a Swiss Model-1918 army helmet from the 40's, and a Japanese 100-mon coin from the 1800's. I'll upload some pictures later on....

I have one of only two boxes that smuggled the enigma machine from World War II.