Don't throw anymore cars at me, I have my fill.
The make I had in mind was the Brewster. Jolson is often noted as having owned Brewsters " Al Jolson was the most recognizable celebrity in New York City at the time, and was an avid automobile enthusiast and collector. Inskip offered Jolson one of the new cars and Jolson jumped at the chance. A black town car with red pin striping was especially built for Jolson with a white-piped red mohair interior that included a radio and a golf bag compartment."
But that picture with the Austin will do instead. You could also have found this: the factory-installed owner plate on his Cadillac.