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Whew, stocking up on goods for Corona sure makes you busy.
Anyway, this is a C96 pistol, in basically every way, it's the same as the normal one, except that this one is chambered not for the regular 7.63x25mm Mauser cartridge, but for the 9x25mm Mauser cartridge, essentially the 7.63mm cartridge necked up to a straightwalled 9mm cartridge.
Ballistics for the 9mm Mauser cartridge would in a typical commercial loading be a 128gr bullet going 1350fps from such a pistol as this, which isn't all too far off from the .38 Super cartridge, as designed for the American 1911 pistol. From the longer barrel of a subgun (which there were some of), supposedly it could achieve 1500fps.
These pistols were intended for export markets, hence the cartridge is sometimes nicknamed 9mm Mauser Export. Mainly these pistols were intended for distant foreign markets away from Europe and North America, aimed for Africa, South America, and Asia.
They're quite rare today.