One of the unsolved mysteries about Arrow's early ride systems was the nature of the "San Francisco" style trolley. Thanks to Bill Hardiman's grandson Michael, we now have pictures.
It's very different than what I'd imagined, appearing somewhat like the streetcars which have served the City By the Bay for decades, but on a miniature scale, matching that of Arrow's streamline locomotives.
Note also the names Mickey, Donald and Limited on the side of the cars, which may be more evidence of Arrow's tight relationship with Disney. These images were shot at an Arrow Playland demonstration park in San Lorenzo Village, in the East Bay. The fire station is visible across the street in the third image.