You definitely have a hybrid there. The lack of spots on the pouch says one parent is leucochilum, or better known as godefroyae variety leucochilum. The spotting is too fine to be the species, so it is a hybrid.
The finer spotting says concolor or possibly niveum. so you may have (godefroyae var leucochilum x concolor) = Wellesleyanum or you have (niveum x godefroyae var leucochilum) or some more complex cross.
I would keep watering it, a pleasant flower.