Hi Susanne.
Sorry to disapoint,

but this is not even close. What you have here is a Hard Cane Dendrobium Hybrid with what is possibly Den biggibum var alba and or Den dicuphum in its background. Den kingianum var alba is far smaller in every aspect, the p/bulbs even though tall are very slender and very light green in colour. The flowers are pure white with a yellow callus on the lip,the segments are all triangular in shape as is the outline of the entire flower. At its widest point it would only be 2cm(3/4inch) accross.
Unfortunatly this is not very highly regarded as far as kingi's go in OZ, A lot of line breeding has been done with the different colour forms with some quite spectacular results.
My plant of kingi alba is in spike at the moment when it flowers I will post a photo or two.
Till then Craig