I'd have thought the V force was built well into the age of electrically illuminated instruments. Certainly this fatuous bolleaux has been associated with some WWII types, the Duxford Lanc being one.
It is deeply depressing that people so fundamentally ignorant of the facts can be allowed to make such idiotic decisions, Beta radiation is stopped by a sheet of paper or a few centimetres of air. No way it can get through the glass face of an instrument.
Who gives these oxygen thieves their worthless jobs?