Here's a billboard for Oreo's. Oreo's were the knock-off cookie, competing with Sunshine's Hydrox Cookies.
The Hydrox were better IMO, not as sweet.
The partial sign on the building in the right top corner looks familiar, but I can't name it.
I don't have a larger version of the photo.
Oreo Billboard Los Angeles, CA by
Krell58, on Flickr.