Rolex Datejust Green Watch 31mm Watch [Oyster case, symbol of waterproofing]. Classic Oyster case with triangular grooved outer ring and the handle adopts a screw-in design to restore the double lock and double waterproof system. Rolex Datejust Green watch features mirror material – anti-scratch blue crystal glass, anti-reflective convex magnifying (2.5 times) calendar window, commemorative strap Jubilee Bracelet stainless steel, head-shaped, semi-circular three-row link, Folding buckle, concealed folding crown buckle Caliber 2236.