Furthermore, The SafeDive process consists of an outer circumstance (on which the outer bezel is mounted) which lets the ingress and egress of drinking water, and an inner circumstance, that's chargeable for shielding the movement. The protrusion at 9:00 houses the coupling equipment mechanism linking the inner and outer bezels. https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/