BOUGIE AC- Lithographed sheet metal circa 1950 . Some scratches and superficial oxidation, small perforations in the red margins, deformations . 73 x 34 cm French cyclist Albert Champion, who founded the Champion Spark Plug Company in Boston around 1900 and the Champion Ignition Company in Flint, Michigan in 1908. In 1909, the company changed its name to AC Spark Plug Company after Champion's initials, and in 1927 General Motors bought all the company's shares from the heirs (source: wikipedia.org).