The two most distinctively different firearms that passed through my ownership were both handguns. One was a Webley Mark IV .38/200 revolver with safety button near the top of the grips. I understand these were police issue in Singapore and I think Shanghai back in their day. The other was also a Webley, a .32 ACP (7.65mm) semiautomatic pistol, which as I recall, only used leaf springs, no coil springs, but I might not be 100% correct there. Both pistols were acquired, and left my ownership, through trades in the 1980's. I like distinctively different firearms in geneal, I have a Dreyse 1907 with tat funky hinge, an Astra 1921 / 400 9mm Largo, and an Astra 600 9X19mm that I acquired in that same era. The Mauser C96 has always been distinctively different IMO as the only screw in the assembly is the grip screw.