Help please, new alloys, genuine or fake?

[zetecor]

Hi, i have just had a new set of style 168 alloys delivered. I asked the seller many times to assure me they were genuine. he told me they were ronal and were made for bmw, I have had ronal wheels before and i know they make oem wheels for a lot of cars.
I just have my suspicions.
Ronal sticker and not stamp on wheel.
no bmw part numbers.
various stamps on wheel inc:
jw via 785kg
>w-476<
bmw 9 799 098
155 20%101/2jj
11+++++
et30
wheels go from alloy colour through to gunmetal grey to back.

Hope someone can help.