The Schwarzlose Model 1898 was a full-size, locked-breech, rotary-bolt, semi-automatic pistol invented by Prussian firearm designer Andreas Wilhelm Schwarzlose. It was chambered for cartridges such as the 7.65×25mm Borchardt and 7.63×25mm Mauser. Small lots were sold to the Boers during the Boer War. Another lot was sold to members of the Russian Social-Democratic Party who were plotting insurrection, but were confiscated at the Russian border and issued to the Imperial Russian Frontier Guards.