Image: Looking north up Vine Street at Selma Avenue, towards the Hollywood Hills. Blackstock Negative Collection via Los Angeles Public Library .
The 1939 Calvert whiskey billboard above is a product of Foster & Kleiser, the dominant billboard company in southern California. See a timeline of the company, including successor companies: http://notablekleisers.blogspot.com/2007/08/foster-and-kleiser-outdoor-billboard.html .
Earlier in the ’30s, the trade association, Outdoor Advertising Association of America, “… adopted an official ‘public policy’ of voluntary regulation by the advertising industry regarding natural beauty. It was intended as a pro-active measure to address the critics of the ‘billboard blight.'”