Designed by Jean Bugatti
The Type 57S Atlantic coupe was based on the Arolithe show car, which was built of magnesium and aluminum. Since those materials couldn't be welded or brazed, Bugatti externally riveted the Arolithe's body, creating the signature seam down the middle of the car. The three production Type 57S Atlantics were built solely from aluminum, but the seams along the roof and the fenders were retained for style.