Does it say Moustache on the label and you are questioning if that's right, or is there no tag and that's your best guess for the hybrid and you wonder what others think? I don't know these hybrids well enough to guess - but it's lovely and has a great flower count whatever it is!
Definitely not a praestans, although you'll have to wait for someone more expert to answer if there could possibly be any praestans in the background of the cross...praestans wouldn't have nearly that many flowers I don't think!
Your flower agrees well with Paph Moustache, and a rather nice one at that. I see no reason to doubt the label. Your flower does not show any Paph praestans that I can see. The deep bold stripes are typical of the better Moustache clones I have seen.
It is what it is. It probably is Paph Moustache. Yours has the same nasty habit as mine, blooming in the crown. Yours and mine are on the opposite spectum of each other for what to expect in the outcome of these two parents. See the link below: http://www.slippertalk.com/forum/showthread.php?t=16140