Well I have no way of knowing anymore. I get all my coins (except change) from the bank. I take what they have available sometimes they are New rolls others are mixed.
But what I do when I go through them is put them into the boxes by Date, Possible DD's, Spike Heads, Cracks, Chips, clashes etc. Then I go through them box by box. So best I can say is that they are from my last purchase of 10 bucks worth :(