Rolex brand Model (Watch) Datejust 31 Reference number 6827 Automatic winding Case Material Yellow gold Strap material Gold/steel Year of manufacture 1990 (Approximate year) Condition Excellent (second-hand, no or barely visible signs of wear and tear) Kit With delivery box, no original documents, one-year shop warranty from the time of award Automatic loading Case Case material steel/gold Diameter 31 mm Waterproof 10 ATM Bezel material Yellow gold Glass Sapphire crystal Strap Strap material Gold/steel Strap colour Gold/Steel Folding clasp Clasp material Steel Functions Data Aftermarket dial with real diamonds