Den. moschatum is correct. The slipper lip is the main ID for it, also is its very nice musky fragrance. I really like the fragrance. I have kept ferrets as pets. The fragrance reminds me of a freshly washed and dried ferret.
I had posted pics here:
Dendrobium moschatum
I looked at mine a couple of days ago. It is beginning to form a new inflorescence. It should be blooming in another few months or less. Plus, I haven't remounted it lower as I said I would. I'll still have to climb a ladder to smell it.