The German military did not actually adopt the Mauser C96 "broom handle" before World War One. It was the first really successful semiauto pistol, but the German military chose the Luger instead, in 1908. However, as World War One continued, the German military realized it was going to be seriously short of handguns. The P08 Luger was a slow and expensive gun to produce, and so Germany went looking for alternatives. They would adopt a variety of .32 ACP caliber simple blowback pistols as substitute standards, but also took a new look at the C96. While the design was quite complex, Mauser still had all the tooling set up to produce them, and deliveries could begin relatively quickly.

In July 1917 the German military placed a contract for 200,000 C96 pistols, specifying that they be chambered for the 9mm Parabellum cartridge, instead of the 7.63mm Mauser cartridge the gun was originally designed for. In order to prevent ammunition mixups (as many existing 7.63mm Mausers had been brought into service as well) the new guns were to have large "9" numerals engraved in their grip and painted red - hence the colloquial name of the guns as "Red Nines". The first deliveries were made in January of 1918, and would continue until the end of the war. Mauser was unable to completely fill the contract, and only about 95,000 were delivered by the end of the war, although production did continue post-war. These pistols are numbered in a new series starting at "1", unrelated to the serial numbers of commercial Mauser pistols. Some, but not all, have a Prussian eagle marking on the front of the magazine. Total production after the war continued into the low 140,000 range.

The guns were all shipped with wooden holster/stock units and leather rigs to hold the pistol, holster, spare magazine spring and floor plate, and cleaning rod. The stocks were numbered to match the guns, and do not have the strap staple that was used on other commercial C96 stocks.

Thanks to Legacy Collectibles for providing me access to film these pistols!