a 31 to 33 Auburn Speedster that went to Muroc dry lake at least twice, and was clocked at 93 mph

 the license plate is a 1940

 On Muroc in 1938, and April 1940

Found by the Motor Life Blog, aka the Reservatory, who posts photos found in scrap books etc etc. This is one incredible find! http://reservatory6.blogspot.ca/2012/07/auburn-speedster-muroc-dry-lakes-route.html