A strange chubby little revolver with a square grip. Some versions have been adapted to use hardwood bullets inlaid with silver in a cage-like pattern and capped to take the powder explosion. They are expensive to make, use modern technology, and are capable of taking down either a vampire or a werewolf.
The 8 mm Tue Tue (kill kill) was a hammerless pocket revolver invented in 1872 with a closed frame for the civilian market (actually it was really invented in 1893). Could shoot 5 bullets in succession. In production until about 1935. Later versions were also sold in .32 S&W and .38 ACP, and some had an external hammer. Its companion was the tiny Le Novo revolver, with a hinged trigger and no trigger guard, also featured a folding grip.