What a lucky girl you are, Angela!!!! That is one AWESOME BLUE VANDA. The leaves would indicate a first generation semi-terete - most probably a V Miss Joaquim with a blue strap leaf vanda. I have noticed that the Thais have been doing a lot of crosses with Miss Joaquim and the few I have seen are not as beautiful as the one you have. You really have a gem there. I'm drooling and will be on the hunt for one.
Here in Malaysia, among us oldies, we refer to first generation (terete x strap) as semi-terete, and quarter-terete (semi-t x strap) and even 1/8 terete ( 1/4t x strap). We still have separate categories for semi-teretes and 1/4 teretes in our shows.