No ID

[Barry]

May be roths x St. Swithin or others!

 

[Ozpaph]

? some sanderianum in there??

 

[Cheyenne]

My first guess would be Michael Koopowitz x rothschildianum, second would be PEOY x rothschildianum. Nice flower, I like the petal stance.

 

[SlipperKing]

Probably a straight PEOY

 

[emydura]

My first guess would be Michael Koopowitz x rothschildianum, second would be PEOY x rothschildianum. Nice flower, I like the petal stance.

I think you are on the right track. It looks like a secondary hybrid.