Hi and welcome to the forum.
First off I see you’re in Germany. Second could you not find a place in Germany that sold chips?
www.the-console-corner.com is a great place; I have used them many times, but just wondering why you went with them. Also I have asked them the same question about the magic V 5k6 and why they have it stated that it supports both V9's and V10's. There answer was that neoasic (there supplier) told them it would work on both versions. I haven’t tested it out my self but I know from what I have seen others state that the Magic V 50k wont work on the V10's and the Magic V 5K6 wont work on the V9's.
I even asked this question awhile back at newz about the same time the V10's started to surface, and the Magic V 5k6's where just coming onto the market. Here is the thread.
http://www.ps2newz.net/forums/showt...?threadid=18542
By the way with your date code being 3C I would most likely say it’s a V9, if you didn’t know already