W.J. Westphal was originally a wagon and carriage builder. They probably also built commercial car and/or truck bodies.
In the 1914 St. Paul City Directory, it was listed as Wm J Westphal Wagons and Carriages Automobile Painting Upholstery and Repairs:
Here is an advertisement from the December 1922 issue of "The Railway Expressman."
The photo was taken in 1924 - Minnesota plate was white on dark blue and that was the only year during the 1920s when the "A" was on the right hand side of the plate.
The wagon appears to say "Schmidt's" and I can also recognize the word "Root Beer" in the upper left corner on the right side of thew wagon. Jacob Schmidt Brewing Company in St. Paul produced non-alcoholic beverages during prohibition. The wagon probably originally hauled beer. The Schmidt Brewery is approximately 2.5 miles southwest of 466 Wacouta, just a short trip down West Seventh Street.
Thanks for adding the photos history Erik!!
Thread drift, slightly .... the above label has me wondering, .... during Prohibition, what
was the legal threshold of alcohol content ?
The answer to your question is printed on the label above.
If you don't believe me, look up the Volstead Act.