I quite often spotted old bits of test gear in some of those B movie scifi flicks. And there was always an oscilloscope with a lissajous figure on the screen, I think that was the anti-matter relief valve
I remember that film 'The Mouse that Roared.' There was another one back then called 'Assault on a Queen' in which a gang of crooks recovered an old U Boat and decided to pull a heist on the Queen Mary at sea. I'm not sure if they used the actual ship for any of the footage .. !!