This is a cross between Paraphal laycockii and Christensonia vietnamica. The tag says it is a Laenopsonia Penang Star, but apperently there has been some changes and the correct name should be Chrisnopsis Penang Star.
I have had this for two years and it is the first time it flowers. The first bud has been open for four days and it seems that it is not going to "open" up more.