This series of photos was taken in 1932 at one of the many Union stations in Southern California, with actress Dorothy Christy and a 1932 Auburn Convertible Sedan. The promotion was for the New Union 76 gasoline that the company had just brought to market along with its new line of Triton Motor Oil. Union was founded in 1890 and is based in San Ramon, California. The Union Oil Company of California, Inc. is still in operation today as a subsidiary of the Chevron Corporation.
In addition to promoting the new line of gasoline, notes with some of the photos state the images were taken for the Union Oil Bulletin, which was a company publication. We can see that Union also handled its own line of Ethyl Gasoline (leaded) and Firestone Tires. The photos give a very clear view of the distinctly-styled station building in the daytime, center photo above, and at night below with Christy in a roadster. The photos are courtesy of USC Libraries.