David,
Darius' reference was to the Fernseh HPE 5R.
https://www.earlytelevision.org/fernseh.html
HPE 5 R (1939). Projection set produces a 17" by 20" picture on a directional screen attached to the lid. This set appeared in a 1939 magazine and was identified as being at the 1939 Berlin Exposition. It was to be sold for about $225.
It uses Baird's patented vertical deflection. Baird was a member of Fernseh A.G. (Information courtesy of Darius-Karim Mottaghian-Milani).
Peter