I really doubt the existence of a yellow gray back House, but I would be thrilled to know for sure that one exists. I truly hope the winner of this card is a member here. Stories say that the gray backs of that series were printed in Canada....I do know many came from the great white north. Also 52's were found in some 53 wax pack in Canada. I don't know about all that but I do doubt the existence of a gray back yellow House. Prove me wrong, please.
Dave.