Likewise, The SafeDive system requires an outer case (on which the outer bezel is mounted) which will allow the ingress and egress of h2o, and an inner case, that's liable for shielding the movement. The protrusion at nine:00 houses the coupling equipment mechanism linking the interior and outer bezels. 114060. https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/