I've heard from a person who was a Philips employee in England in the 50s. He says that the K1 used a 21 inch CRT, and was made later than 1950. That obviously doesn't agree with the picture you posted, which looks like a projection model. Can you tell me any more about the picture? Where did you find it? Is it dated? Is there text that refers to it as a K1?
Thanks for any information you can provide.
Regards,
Steve
see early television at
www.earlytelevision.org