I'm quite familiar with Sansin/Suntour/Specialized cartridge bearing hubs and by that photo it doesn't appear to be one of those. What gives me pause is the silver nut right next to the cartridge bearing, the hubs I have use a black bearing mount that takes a thin cone wrench.The construction of the axle parts is much the same as cup/cone bearings, with the nut is at the end of the axle.
The silver nut position reminds me of how Quando hubs are made.