Australia Postage Due Kangaroos

I was scanning some of my Postage Dues and noticed that the very small Kangaroos vary quite a bit from value to value. In the 1/2, the tail appears broken. In the 4, I have a tall-eared Kangaroo. While the 6 seems a little frumpy. Similar differences with the Ostrich/Emu on the other side. Is this typical, or do I have some counterfeits?

Can someone scan one of theirs for comparison? These look a little fishy to me. Thanks.

Hope this helps.!

Your stamps are kosher.

This from my research material:

"The type is not entirely constant between different values, the differences being in certain details of the designs of the original wood block dies as under:-

½d. Kangaroo (on left): Broken tail.
1d. Kangaroo: Double tail.
2d. Kangaroo: Tail normal, fore paws merged together.
3d. Kangaroo: Fore paws separate, Emu (on right): Completely fills circle.
4d. Kangaroo: Fore paws lightly drawn. Emu: Short and squat.
6d. Kangaroo: One fore paw only, drawn thin; tail does not cross circle.
8d. Kangaroo: No fore paws.
5/-. Kangaroo: Very small fore paws.

In all values, except 8d., the UE of DUE are joined at the top."

Cheers,

John

Thanks to both John and Robster for the help!