Civil War bullets - The bullet marked with human teeth is most interesting to me. Sedatives were not widely accessible in war times, soldiers were given a bullet to bite down on. Hence the term 'bite the bullet' to get something done and over with.
*CIVIL WAR PINFIRE PISTOL~from Gettysburg Battlefield. Invented in 1828 by a Frenchman by the name of Casimir Lefaucheux, it was one of the earliest practical designs of a metallic cartridge. The pinfire history is closely associated with the development of the breech-loader which replaced older muzzle loading weapons.