Wonderful suprize! Thinking it maybe an Aerides! Lost a bid recently to a duo of orchids, one of which was this ( which jogged my memory) with a trichoglottis species also. The shape and form of the inflorescence in your pic instantly reminds me of the pic in auction, however I nowhere near knowledgable enough to attach names to faces and to be honest with my careless approach with labels Im not gonna get anywhere fast!