Mentioned in the ESSO Road News, September 15, 1938.

RCA giving public closed circuit TV demos at the RCA building.

Do you have the rest of the article on page 3?

Do you have the rest of the article on page 3?

I didn't post it because it says nothing about television, but here it is anyway (titled "Glorious Gardens in Lofty Settings").

Here's an undated Rockefeller Center tour folder that had a TV demo insert (3.6 MB pdf file):

http://www.bretl.com/tvarticles/documents/RockefellertourbkltwithTVinsertca1938.pdf