Most of you are missing the point. Regardless of SN or SL, that bottle is still old stock. Castrol no longer uses the Syntec name; it's now called Edge just like the non-Euro versions. Also, it's made in Belgium now, not Germany anymore.
Yes, even though the Euro 0w30 is still SL, the OP's bottle is not new stock.
Here is a picture of new, recent-stock Castrol Edge 0w30: