This is a very rare oval metal serving tray advertising an Anheuser Busch Distributor in Saint Charles, Missouri, named E. H. Hoffmann. Circa 1900, this tray was produced by one of the companies in Coshocton, OH. Anheuser-Busch did not do many distributor trays at the turn of the century, and I am only familiar with one other tray from this distributor. There is one other one featured from Iowa in the Anheuser-Busch Collectors book which is for a distributor in Iowa. However, that tray is in a completely different style.
Anheuser-Busch is based in St. Louis, MO, but has plants in Los Angeles, CA, Newark, NJ, Tampa, FL, Merrimac, NH, Williamsburg, VA, Houston, TX, Baldwinsville, NY, and many other locations. The company is now owned by InBev, based in Brussels, Belgium.