I always enjoy the early Group 1 pre 1941 car at Sonoma.
Here are some and even though it was a bright setting sun I hope you get a view but they are not up to Nigel's standards I am afraid.
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Logan Calkins in his 1935 Austin Seven Nippy.

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Nathanael Greene in his 1925 Bugatti T 35 being chased by Max Jamiesson in his 1935 Ford Sprint Car.

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Another view of the 1935 Ford Sprint car.

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Richard Morrison in his 1939 Lagonda V-12 LeMans replica # 12.

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A beautiful machine from any angle.

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(Ken H photos )