In the Noir film "He Walked By Night" Richard Baseharts character has built a projection set that can throw a 12 foot image, the set is shown from the back side and it's obviously an RCA 630 chassis, (note the model number tag is scraped off).

Has anyone seen this set or is it a movie invention?

I believe it was more than a prop because there is a high voltage tripler chassis visible below the main chassis, a detail that wouldn't have been needed for a prop.

http://www.vintagetvsets.com/temp/arf/wbntv.jpg

http://www.vintagetvsets.com/temp/arf/wbntv2.jpg

Maybe this 1948 advertisement is it.

John