I got this at level 9 for turning in 5 grade A's for a moderate batch - a sigil mod said it was really supposed to be a quest reward..so replace that with some other heroic item
I got this at level 12 for turning in 4 grade A's and 1 grade B for a moderate batch (unfortunately it was 1 hour before beta ended)
I only crafted for 3 days in beta, so that was pretty good
I got all kinds of dusts for turning in B's on moderate batches.