Daryl, the Miller trigger shown is on an Ideal Grade I own. When I first bought the gun years ago, I saw that it had stamped Hunter One Trigger on the trigger plate. Looking at the gun saw that the selector was in the safety, and taking gun apart saw it to be a Miller.
The Hunter One Trigger is on a few of my L.C. Smiths and all work great.
The Infallible I believe is also from an L.C. Smith but do not know who sent it to me.

David