The answer depends on the TV or radio we are talking about. In the last months I spent a lot of time restoring a prewar radio what means I had to restuff around 25 wax/tar caps, adding new connection leads seal the whole things again and so on. Of course this was much more dirty work than restoring an average 1950s TV set.
I consider to build in a 1954 FM after market tuner from the same manufacturer into the prewar radio. I connected the FM tuner for test reasons and it sounded surprisingly good
What do you think about adding the FM tuner to keep the radio functional? Unfortunately AM is almost dead here in my region...
BTW: I own the radio which is in very nice technical and optical condition since more than 20 years and restored it accurately this year because of the large number of caps.
Greetings Josef