It's authentic Levan 732, already discontinued cut. White inner tag/label on the waist is not missing, Levan is just old cut where this tag wasn't at all yet. (don't know, when Diesel started with this white tag).
All datas, cut, wash, size, lab etc. are stated on the inner smaller tags. I don't know what do you mean with cheap or celeb line.
I also want to know whether Levan is expensive or not.