If the color covers of these booklets advertising Union Pacific streamliners are meant to have local significance, it’s hard to imagine what this grey cover denotes unless it is the clouds and fog that are often found covering San Francisco Bay. This particular booklet is much like the one for the City of Portland, including many of the same photos.
The early, twice-weekly City of San Francisco had a special lounge car called the Nob Hill, but when Union Pacific added more trains to make it a daily service, it used generic lounge cars. A picture of a lounge car on page 8 may be of the Nob Hill, as a painting of San Francisco from Nob Hill adorns the front of the bar. But the booklet says nothing about that unique car and instead just mentions the friendly atmosphere of the lounge.