The lip, the overall colour and form of the blooms and the semi-terete plant itself all point to it being a V Josephine van Brero hybrid. There are literally thousands of plants and scores of hybrids that look like this growing in gardens and orchid collections in S E Asia. JVB has been crossed with numerous vandas and ascocendas to produce similar looking hybrids. It would be near impossible to to ID it with any certainty.