These pictures are from a 1946 Philco publication called The Servicing of
Television Receivers. Although it was published in 1946, the photos are
of their 1940-41 model sets. The rear of this set can be seen in this article about a new type of TV antenna.
The 10AP4 CRT.
Notice the flat face, and #206, the "bending coil", which is an ion
trap. This tube was one of the first to use a "bent" electron gun, which
allowed the ions to miss the screen, while the bending coil moved the
stream of electrons so that they hit the screen
Click on picture for high resolution image
