Clue
The same car manufacturer also made this.
There was a day, a little more than 100 years ago, that a strange-looking conveyance motored along the streets.
Strange because it was self-propelled, an automobile. Strange because it had six wheels, although the American automotive industry was so new that it probably wasn't the number of wheels that caused heads to turn.
The middle wheels powered the vehicle so when the center tires hit a high spot, the car seesawed from front to back.