The SkyDweller, Functional GMTModel : 18K Champagne Gold Plated Stainless Steel Caseset, Fluted Bezel, White Dial, Roman Numeral Markers on Oyster Leather Strap with Insignia, Rolesor Clasp Movement: Asian Seagull ST-3855 Automatic Movement, Functional GMT Functions: Hours, Minutes, Seconds, Date Inner GMT Disc .. Set Via Crown Dimensions : Dia 42mm x 12mm Thk Material : 1 piece forged case construction, solid 316F stainless steel, Thick 18K Champagne Gold Plating .. 5 Mils Back : Solid case back with Hollogram Crown : One-piece screw down crown with o ring Crystal: Sapphire crystal Water-resistant