Made from antique bottle containing moss and skeleton key.
The bottle is actually screwed into a valve from old gas lamp and they fit together perfectly!
Unfortunately it was later damaged by airline security apparently thinking that it was some sort of incendiary device or who knows what. They basically forced it back open (it was glued shut to make sure it wouldn’t loosen later on) and it has never been the same. The piece of measuring tape and the watch gears on the surface cover the part that was damaged.
It hangs by decorative steel wire and a leather cord with a hand made clasp.