Stainless steel case with a stainless steel oyster bracelet. Fixed, domed bezel bezel. Blue dial with luminous hands and luminous stick hour markers. Minute markers around the outer rim. Luminescent hands and dial markers. Date display at the 3 o’clock position. 31 jewels automatic movement. Scratch resistant sapphire crystal. Case diameter: 31 mm. Deployment clasp. Water resistant at 100 meters/ 330 feet. Functions: hours/ minutes/ seconds/ date. Rolex Datejust Blue Index Dial Oyster Bracelet Unisex Watch 178240BLSO.