In Reply to: Why, I mention this posted by Dave Smith on December 17, 2018 at 17:52:44:
In the book "The Early Ford V8 As Henry Built It" by Edward P. Francis and George DeAngelis, says that, "...all standard Ford batteries had the oval FORD script logo molded on one side." A few paragraphs later it says, "... A heavy duty special equipment battery made by WILLARD and EXIDE was made available starting in July, 1933. It had no markings on the side but featured a pair of handles, one at each end for easy removal...". They go on to say that a service battery with the oval FORD script logo painted red was also available at dealers from February 1934 to the end of 1936. For 1937, the oval FORD script was painted green. Perhaps the Model T and Model A Ford club guys can further add to this. I believe EXIDE supplies NAPA, some Ever-Start, and Champion brands. There are but less than a handful of US battery manufacturers. EXIDE, JOHNSON CONTROLS, EAST PENN, and DELPHI are what I found. I never heard of WILLARD until I read that Early V8 book.