Onc. Mendenhall 'Hildos' FCC/AOS . The award description says it all:
"Two flowers of excellent sh ape on two long inflorescences borne on a well-grown plant with leaves of heavy substance; flowers large, well-presented, unusually flat; dorsal sepal and petals green, heavily overlaid with bold mahogany blotches; lateralsepals pleasantly undulated, yellow, heavily blotched burnt sienna; lip midlobe yellow proximally banded with 1-cm-wide, burnt-sienna ring, crest yellow with burnt-sienna lateral stripes; column off white with mahogany-wine ciliaon wings; substance firm; texture sparkling."