After establishing the position and shape of the 1960s TV set previously, I now worked on the screen and controls:
For the background pattern, I thought I’d use a geometrical pattern popular in the 1950s and 60s; the museum had examples in the kitchen display:
The space under the TV looked right for some triangular shapes.
The shapes look like slices of pizza at the moment, with the different shades of wood; when it all settles down to a uniform colour and has been oiled it’ll look more subtle.