Image: article in unspecified 1939 magazine.
“The Darkroom was a real camera store on the Miracle Mile at 5370 Wilshire Boulevard, Los Angeles. It opened in 1938 (or 1935 or 1937, depending on which book or website you want to believe). The 9-foot-tall camera was made of black vitrolite (an opaque pigmented glass), with clear glass as display windows. The round window in the position of the camera lens echoes the use of round porthole-style windows in other Streamline Moderne buildings of 1930s.”
Excerpt from http://www.yesterland.com/darkroom.html . Click on the link to see newer images and how this storefront was copied at theme parks.