What orchid is this?
 

Definitely a Zygopetalum. Can't help past that. :)

maybe Zygopetalum mackayi ?
:dunno:
definitely Zygopetalum or hybrid of

Maybe Zygopetalum Jumping Jack..?

Gorgeous! Unfortunately you're not going to get anything more precise than Zygopetalum. Too many hybrids out there.

It might be Zygo. B.G. White 'Stonehurst' AM/AOS but would be impossible to say for certain.