I have a tiny little piece of coal from the Titanic.
OH!! Cool historically important stuff time!!
I have a long roll gun camera from a WWII Messerschmidt made by Rolleiflex. These cameras were used to document and improve upon the effectiveness of German aerial weaponry of the era.
It is a kind of drab green and it uses hundred meter rolls of ninety millimeter film. It weighs about fifteen pounds. I do not have any film for it, but it is still a really cool toy