ROLEX REF. 5513, MILITARY SUBMARINER MADE FOR THE BRITISH ROYAL NAVY, “MILSUB”, STEEL , ROLEXREF. 5513, MILITARY SUBMARINER MADE FOR THE BRITISH ROYAL NAVY, “MILSUB”, STEEL, A fine and very rare, stainless steel, self-winding wristwatch with black dial, fixed bar lugs, graduated directional revolving bezel calibrates to minute intervals and screw back.