I was doing some work in the teaching greenhouse and I came across this Vanda, with no tag. I know that I won't be able to get a definite ID but your ideas may help me find out what it really is, if it is in our collection database.
It appears to be an Aranda (Arachnis x Vanda) or Mokara (Arachnis x Ascocentrum x Vanda) hybrid. Unless you have a very extensive Vandaceous collection that probably narrows down your database search quite a bit.
With the fairly recent reclassification of Ascocentrum as Vanda, any Mokara would be Aranda now. But unless it is a very recent purchase your database would most likely still list Mokara.