BRAND : Rolex MODEL : Sea-Dweller DeepseaMODEL CASE : Oyster, 44 mm, OystersteelOYSTER ARCHITECTURE : Monobloc middle case, screw-down case back and winding crown. Rolex Ringlock System case architecture with Helium escape valveDIAMETER : 44 mmMATERIAL : OystersteelBEZEL : Unidirectional rotata..