Howdy Craig and Coffinator,
First that is a gorgeous firearm (can't tell if it's a rifle or smooth bore).
Coffin: the example is a firearm that was used many years ago when I was just starting to shoot. We used to wander around in river bottoms looking for the kind of rocks that would make sparks when they struck iron. That was also how we started our fires in the sod house.
Rev. Chase