But an expensive one!
Well, the movements are taken from ETA, Valfleurier, Minerva or Piaget, and Panerai used to house Rolex, Angelus, Zenith, JLC, which is not an exhaustive list.
Therefore, as Panerai was a " Laboratorio de Ideas ", the simpler is the better, so I would be happy with a simple, accurate and reliable movement.
But this is only my take, of course.
Best,
Nicolas