The Jaeger Lecoultre 414 is an open face calibre watch movement that features a Breguet hairspring and shares similarities with the 618 movement, although the exact differences are not known. The 618 movement is believed to be a variant specifically made for Rolex/Panerai. The Jaeger Lecoultre 414 movement offers stem wind and set functions, as well as a sub-second display. It was commonly used around the period of approximately 1945.