Rolex. A stainless steel automatic calendar bracelet watch Sea Dweller Deepsea, Ref 116660, Purchased 26th July 2013Rolex. A stainless steel automatic calendar bracelet watchModel: Sea Dweller DeepseaReference: 116660Date: Purchased 26th July 2013Movement: 31-jewel Cal.3135 automatic, adjusted to 5 positions & temperatureDial: Black, luminous filled dot hour markers, baton quarters, white outer minute divisions, date aperture at 3, polished Mercedes hands with luminous inserts, centre secondsCase: Brushed and polished tonneau form, screw down back and shouldered crown, black Cerachrom uni-directional calibrated bezel, gas escape valve to the band at 9, No.G797550Strap/Bracelet: Brushed Oyster linkBuckle/Clasp: Signed folding claspSigned: Case, dial & movementSize: 44mm Accompaniments: Rolex box, international warranty, 2 spare links, brochures, swing tagsThe original Sea Dweller was launched in 1971 and featured improvements to the previous Submariner model based on the adjustments made for the Comex diving company, such as a strengthened case and helium gas escape valve. These modifications allowed the Sea-Dweller to withstand the high pressure of deep-sea level diving and repeated compression/decompression cycles. The Ref:116660 Deepsea can withstand up to a depth of 12,800 feet (3,900 meters).