[dazzlevision]

If the label isn’t there, it’s probably came unstuck and was lost some time in the past (or might even be lurking at the bottom of the cabinet somewhere).

I have found that the contact studs of the UHF “biscuit” in the VHF tuner (the long one) sometimes don’t actually make contact with the springy fixed contacts or may just need cleaning and lubricating. This will cause no (or weak) UHF signals, even with a strong aerial signal.