In an effort to appeal to American and British military testing commissions,
Georg Roth produced a handful of prototype Roth-Krnka pistols in .45 caliber. They used a proprietary cartridge; the 11.5mm Roth (approximately 200 grains at 660 fps, although more powerful versions of the cartridge would be used in other trials pistols later). The gun is a very interesting intermediary design, with the front end of a 1907 Roth-Steyr and the rear end of a Roth-Krnka, complete with exposed hammer.