The Mercer Automobile Company intended to enter the Porter-Knight Mercedes shown here in the 1915 Indianapolis 500, however my research shows no Mercer entries competed in that race. Mercer had entered cars in previous 500's without a win, and they faced a changed race when they attempted to qualify for the 1915 race. In 1913 the field of competitors had been reduced to the 33 as a safety precaution and, apparently, the smallish Porter-Knight didn't make the cut. It's a spunky looking little car, though. Kind of reminds me of a Model T bucket hot rods.