Hi jjmclell,
I do not want to be a downer but I am not sure that you have a "long moustache" variety on this stamp. If you are referring to the "extended moustache" variety that the Unitrade catalogue lists as #166i, then I do not think this is it.
This variety usually appears as a pretty dark spot at the end of the moustache that makes it appear longer. The spot is usually quite strong and often darker than the rest of the real moustache. A couple of examples are shown below on the left side of the pairs in the image.
Your stamp look like a normal version to me (the right side in my image below). It is hard to tell from your image, but I would expect any extra colour at the end of this moustache would be attributed to the postmark that runs right through it. To me, it looks like a normal copy.
