The Browning Model 1906 was initially produced in .25 ACP, .32 ACP, and .380 ACP calibers. In 1910, a variant was introduced in 6.35x15mm Browning (.25 ACP).
The Browning 1906 pistol was discontinued in 1914, and was replaced by the Browning Model 1910, which was a more compact version of the Model 1906.
Regarding the availability of magazines for the 6.35mm Browning Model 1906, since the pistol was discontinued over a century ago, original factory magazines may be scarce and difficult to find.
However, some manufacturers do produce aftermarket magazines that are compatible with the Browning 1906 pistol, including magazines for the 6.35x15mm Browning cartridge.
You may be able to find such aftermarket magazines from reputable firearms parts retailers or online stores that specialize in firearms accessories. It is important to ensure that the aftermarket magazine is specifically designed for the Browning Model 1906 pistol in 6.35mm caliber for proper fit and function.