Looking at the spec .pdf they're made by Wheelworld which are a widely available brand on German wheel rim websites and appear to around a while. They normally come in at the lower end of the price scale, as for quality and COO I'm not sure.
Good find. I went and had a read on the Wheelworld website where they briefly present their premises and manufacturing techniques and certifications and it doesn't look too bad. They seem to be a relatively new (founded in 2007) manufacturer aiming for the lower/mid wheel class with very competitive prices while meeting German standards and having TUV approval as well as their own QC. I guess they have to otherwise they wouldn't survive in a market like the German. They use gravity or low pressure casting, no fancy stuff like forging or flow-forming, fair enough. That combined with their young age and no motorsports involvement is I guess why their prices are kept low. They (clearly) don't target the premium wheel class but rather offering decent wheels for people on a budget.
In the end, knowing they are a German, TUV qualified company and not some cheap Chinese ebay replica maker, is probably enough for me and I don't know how much I am actually (if anything) losing compared to wheels of double the price. For example my other alternative, the Neuspeed RSE10 are twice the V1's money and are flow formed and lighter but I have seen several owners reporting cracking which is quite disappointing for the price.
I anyway don't need to move on with the purchase until next March so I'll continue keeping an eye on their wheels and reviews and if nothing worrying comes up I think they'll be my next summer set with some yummy PS4S around them...
http://www.wheelworld.de/en/company/aboutushttp://www.wheelworld.de/en/company/production