So what, you may ask.
But, all the clocks in the museum are set to 4:58, the time cabinet was first held there on 15 October 1940.
They don't have any workings or power, and the ceiling is too thick for any vibrations from the street above to have any effect.
So are these unexplained happenings ghostly goings on, or a tricksy member of staff having a laugh?
Check out our picture gallery below to make your own mind up...