Very cool. I was not aware of the Hemphill "half H".
My opinion is that if the Murr'y, Shappe, Nodgrass, Mitchell "Toront", etc. cards bring a premium, which they of course do, then the Hemphill's, Randall's, Wiltse's (assuming another surfaces), etc. of the set should bring their premiums too. They're no different as far as the source, and scarcity, of the variation goes.
Yes, I own the Wiltse.