Ironically, those are not Y-3, lol. The 10 year celebration is indeed for the collaboration with adidas but that started with mainline collabs for women for the AW01 collection (or was it SS01?) and then for men's for AW02. I think Y-3 started in 2003. He's done a few mainline collabs for menswear, back in SS08 and AW08 they did the gsg9 style boots, and now for AW11 - like the ones I assume you got - I guess they're also considered YYPH x adidas rather than Y-3? Could be wrong about this since I haven't seen them in person, but these were sold in the YY flagships and Y-3 stuff are not.