At the wheel of one of the Deidt/Offenhauser Blue Crown Spark Plug Specials, Mauri Rose, seen here following a qualifying run, wins the 1947 Indy 500.
According to his Wikipedia entry:
"Late in the 1947 race, Rose found himself lying second to his rookie teammate, Bill Holland. But Holland, still unfamiliar with how to read the scoring pylon near the front straightaway, thought he had more than a lap lead on Rose, instead of just a few seconds. Rose closed on Holland and to his amazement, Holland gave way without a battle and even gave Rose a friendly wave as he went past on his way to victory. Holland was furious afterward."