GW, I nearly forgot to thank you for all your LA Times articles about the Produce Terminal and Federal Cold Storage building - they add a huge amount of background info.
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The picture below is part of a trio titled "Sign boards, Southern California, 1927". No location is given.
USC Digital Library
In the foreground there's a sign for Arlington Avenue. No name is visible on the paperhanging business, so the inset business name (from the 1927 CD) is a guess. However, the next picture places the location on West Vernon, so the address is about right.
Detail of picture above/LAPL
I can be more certain of the name of this business as it appears on the side of the building. It's also the reason I'm confident that we're looking at West Vernon.
Detail of picture above/LAPL
Here's the current Google Streetview image of West Vernon from Arlington.
GSV
Moving to just west of 2nd Avenue, the old H G McElheney building is still there at 2406 West Vernon.
GSV
There's no way of telling the original color from the B/W picture above, but I'd wager that it wasn't pink! Strip away the bars and it still looks pretty intact.
GSV