The Fulton Traffic Light Finder is a dash-mounted glass prism used in trucks from the 1940s and 1950s. It helped drivers see overhead traffic lights without leaning forward. At that time, many signals were hung high in the center of intersections, and truck visors or rooflines often blocked the view. This was especially common in models like the Mack L Series, Kenworth 524, White Super Power, and International KB Series. It was a handy tool, often added by dealers or installed by owners. Simple