It's not the Phragmipedium of a thousand names (humboldtii/popowii/warscewiczianum/lmnop). It may be a hybrid of it, though. Did part of the label get broken off or is it possible that part of the name has faded/worn off?
I don't think I can give you an accurate name for it, since there are a lot of this type of hybrid that look similar, and then when you add in all the taxonomic changes over the years, the picture gets even fuzzier.
They're pretty flowers either way, even if you don't know the name.