Poster - copy courtesy Mike Ryan in the USA - this is the event that James Dean was going to in his Porsche 550 that had replaced his 356 - October 1955.
By accounts I have read the car was supposed to have been trailered [ behind 1 1955 Ford Ranchwagon [ Station Wagon ] but in the end Dean and his mate drove the Porsche when that fatal accident occurred.
Dean called his car " The Little Bastard " and has that sign written on it.

Name:  Motor racing SCCA #2 Salinas Races Ca 02101955 poster cropped James Dean - Mike Ryan (2).jpg
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