DuMont RA-108, how to maintain?

Hi! I am new (and lost) here an recently received a few great vintage pieces from an aunts home. A Dumont RA-108 TV in great shape, a Bendix 1953 clock radio, and a mid-century modern Magnavox 264k radio/turntable. The two radios both work perfectly, and I believe the TV does as well but. Can anyone tell me the basics to preserve and maintain it? I don't even know where to start.