This one nearly caused me a spit take.
http://cgi.ebay.com/1916-Morehouse-B...d=p3286.c0.m14
Granted, the Morehouse Baking ad back is fairly scarce for m101-4&5. But a blank-back Morehouse is hen's teeth rare. Seller must have a well-trained eye, because it looks much more like a Mall Theatre blank back to me, although if you told me it was a Green-Joyce blank back, I couldn't argue. Is there even a hint of a Block & Kuhl blank back in there too? I know, it's a Gimbel's overprint on Sporting News blank back--now that's beyond rare!!
Talk about the emperor's new clothes. Oh, by the way, to make it even more valuable, the card is a reprint.