You might find these videos interesting. It's the 50th anniversary special of KDKA in 1999. They started in 1949. Besides the history and video clips there are some vintage sets in the production.
http://kdka.com/video/[email protected]
http://kdka.com/video/[email protected]
http://kdka.com/video/[email protected]
http://kdka.com/video/[email protected]
http://kdka.com/video/[email protected]
http://kdka.com/video/[email protected]
They might start with a 15 second commericial. But not always.
John