Thanks for finding yesterday's Julius Shulman subject,
Tourmaline. I checked every listing for "Security First" in the contemporary CDs. After you identified the location, I found that branch listed as "Security 1st"! There are very few of the original design details left.
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Today we have Julius Shulman's views of American President Lines. The first shot makes the narrow store look deceptively small. This is
"Job 20: W. Dorwin Teague, American President Lines, Ltd. (Los Angeles, Calif.), 1947".
Even this shot from the window doesn't show the depth. I'm guessing that the circular windows near the stairs are there to simulate portholes.
Finally, we get to see the full length of the counter, and the world map behind.
The lady in the center has obviously been shopping at one of the many fur stores we've seen in pictures of this era.
All from
Getty Research Institute
I found American President Lines at 510 W 6th Street in the 1942 CD. Today, 510 is the number on the awning over the entrance on the right. The entrance was once a big arched opening, so American President Lines must have been in one of these stores, probably the GNC store in the middle.
GSV
Here's a 1948 advert for American President Lines showing the SS President Wilson, which can be seen in model form in the shop window. Maybe someone can work out how much $2470 in 1948 would be worth today.
eBay