Back in July 2010, sopas_ej posted this photo of Carl's Restaurant and asked if anyone knew the location. The image is no longer coming up with the original post, so I'm reposting..
Dick Whittington Collection/USC Digital Library
Yesterday I found these matchbooks on e-bay and it appears there were two Carl's locations in Los Angeles, with this being the Flower and Figueroa location (and gone with the Harbor Fwy).
I decided to take a Google Streetview looksee to find out if the Vernon and Crenshaw building was still there. It's not, but on the NW corner there is this streamline moderene gem! Does anyone know the history of this structure?