This 19th-century multi-tool from Germany has 100 different blades and a .22-caliber five-shot revolver.
This knife could be described as the Mother of all Swiss Army knives. If you count the miniatures inside the tortoise shell handle covers, it has 100 “blades.” They include pocket knife blades of every style imaginable, a serrated blade, two dagger blades, several different types of shears and scissors, an auger, a corkscrew, two saws, a lancet, button hook, cigar cutter, tuning fork, pens and mechanical pencils, mirror, straight razor, and a functional .22-caliber five-shot pinfire revolver. The one modern convenience it doesn’t seem to have is a bottle opener, but the bottle cap as we know it wasn’t invented until 1892.
Source : National Museum of American History