40+ years ago, I saw a NINE-barrel percussion gun for sale at WAFFEN BENNEWITZ in Kaiserslautern, BRD.
(That firearm was just one of the many weapons there that I couldn't afford, as a 2LT!! = Waffen Bennewitz was the cause of my "being really poor" from buying "hammer" drillings & cape-guns. I always had 2-4 such weapons that I was "paying on".= CHUCKLE.)
When I asked about the weapon, I was told that it was built by a watchmaker from SZ & would fire 9 shots at once or "ripple-fire".
(I don't remember any more about it, except that it looked to be about .35 caliber.)
yours, satx