Case material: Steel; Charge: Automatic; Conditions: New Presentation condition : With boxes and all papers; Price on request Gmtbroker Reference: 16623Blue Rolex 16623 Blue Complete Details: This watch features: Polished finished stainless steel case. Crown: Patented "Triplock" locking crown crown ensuring that the crown screws down against the Oyster case as securely as a submarine hatch. Polished stainless steel. Bezel: Solid 18kt yellow gold. Bi-directional rotating bezel. Polished beveled corners. Ribbed edge for a sure grip. Matte/Sand-blasted/Frosted finished recessed top with raised polished finished numbers & graduation indexes. Bracelet & buckle features: Brushed stainless steel outer links & polished 18kt yellow gold center links. Oysterlock double-locking deployant clasp. Dial: Metallic blue dial . Applied polished yellow gold rimmed hour markers with luminous fill. Polished yellow gold hands with luminescent fill. Date window displayed at the 3 o'clock position with a "cyclops" magnifier. Rolex in-house manufacturer caliber 3135, beats at 28,800 vph, contains 31 Jewels & has an approximate power reserve of 42 hours. This watch is also known as 16623Blue