Among the most noteworthy recent handgun designs, two stand out through their original technical solutions. Mars autoloading pistol of 1900. But that’s all very recent history as far as gun designs go. It turns out that the concept of a bullpup handgun with a very low bore axis goes back much further.
This percussion revolver fires from the bottom chamber and it is a bullpup, so it is effectively a distant ancestor of both the Boberg and the Chiappa designs. Not bad for a weapon patented 154 years ago!