Ever wonder how car show dash plaques got started? I don't know the whole history, but my guess is they evolved from the timing tags that early clubs like the Southern California Timing Association (SCTA) handed out to racers at the dry lakes. These were stamped metal plaques that indicated the car, date, and top speed achieved at a given event. These timing slips were then pop-riveted to the car's dash as proof of the car's top speed. The history of dash plaques may even go back further into the circle track days of the ’20s.