Now I need help identifying

[cirillonb]

In spite of my resolve never to by an unlabeled orchid I couldn't pass up this beauty on the clearance shelf of a local grower. He thinks he hadn't yet entered the code into his computer (his are identified by coded tags until sale.) The whites are so clear and the purple throat so intense that (for $14) I could not pass it up. Now I come begging for naming help. I looked through all 400+ pictures on Jay's internet encyclopedia but anything close did not pan out on OrchidWiz.
The flower is about 5 cm across. There is a spill of the purple deep on the side petals.