This help at all?
Folks to write here.
http://www.1904worldsfairsociety.orgSays the MO Historical Society Research Library has the official books on the fair. That would be my next move, as suggested above.
Here is an extensive website.
If you go down to "exhibitors " at the fair in the middle column, Savage Arms is listed under the S Manufacturers, and then included in Hardware, section 41. Nothing really to see, just their listing.
http://atthefair.homestead.com/Misc/Misctit.html