I received a phone call from the Buffalo Bill Historical Center's curator stating the the Kornbrath's personal Flues made gun is a boxlock. Tom Mix's gun no longer resides at the museum.
Also worth noting...shortly after Ithaca Gun Co began producing the Flues model, IGC had sue to Fox Gun Co, still in Phiolidelphia, for patent infringement in order to stop manufacturing of guns based on the Emil Flues 1895 patent 516546.

If anyone owns a pre 1908 Philidelphia Fox with unusual mechanicals, perhaps you have a Fox Flues model. There was a small write up on this law suit in the Syracuse Post Standard on Saturday August 15th 1908, in which Flues himself testified. The article indicated that the Fox Flues gun had already been being produced.

Numerous additional photos have been updated to the Flues and Newton pages at the Iroquois website but I could not get a legible copy of that 1908 article to post. If anyone has a legible copy of the article, or photos of a Fox Flues model, please consider allowing Iroquois to post the info in their database for everyone to see.