Tung Sol Flasher [top] -

The is one of the most significant safety innovations in automotive history, introducing the first commercially viable automated turn signal technology to the global market. Developed by Tung-Sol Electric Inc., this simple, self-contained electromechanical component replaced hand gestures and mechanical semaphores with the familiar rhythmic, blinking indicator lights used today. For decades, the distinctive "tick-tock" sound of a Tung-Sol thermal relay was an acoustic staple of the driving experience.

Today, original vintage Tung-Sol flashers—such as the iconic 229D, 535, and 552 models—are highly sought-after components for classic car restorations. The Evolution of the Automotive Blinker tung sol flasher