This one could be interesting to some of us, as it takes a little detective work. Scott 21e is a rough paper, Die Ia. This picture should clearly show that it is a rough type of paper.
The Die Ia variety is the little "spur" that you see on the left 1.
What makes this one a little more interesting are the features that make it an ACSC 72(2)ja, a substituted cliche. At the top, you can see a break in the frame at the right, plus the crown is solid.
Then, you can see a very small "egg" located below the emu.
It really pays to have the right catalogs to help you identify these varieties (Scott is severely lacking in these areas).