I will agree with Zach, adductum x chamberlainianum!
The golden background color of the dorsal seems like an adductum kind of thing. And the other parent is def. a sequential. I would guess chamberlainianum because of the heavy blotches on the petals and the subtly spotted lip.
Some of you were very close, but the two parents were:
Paph kalinae (also known as Paph. victoria-reginae var. kalinae or Paph. chamberlainianum var. sumatra) and Paph. sanderianum. The darker colors come from Paph. kalinae; that is why some of you were confused and thought that Paph. adductum was one of the parents.
To me Paph. kalinae is very distinct and should be considered as a separate species (compared to Paph chamberlainiaum); as you can see the hybrid made with this species looks different than when you compare it to Paph. chamberlainianum x Paph. sanderianum. Guido Braem thinks it is a distinct species too. The orchid registrar has accepted this entity to be different from Paph. victoria-reginae (they consider Paph. chamberlainianum as Paph. victoria-reginae) for registration purposes, but they still have to decide if it will be accepted as a different species or as a different sub-species. For know it has the hybrid name of Paph. Eine Kleine Nachtmusik
I actually met Guido right after he separated kalinae, and when he saw Tom's in bloom (originally from Rands), he highly recommended taking it to a judging. With his written positive ID, the plant was awarded Paph. kalinae 'Ramona Cox' HCC/CHM/AOS and the award photo is the photo used in his newest book. The plant later almost died, but luckily didn't and Tom and I both have a single growth piece of it.