Specifications 2006 Grade 1 Genuine Swiss made Valjoux7750 Automatic Chronograph Limited Edition has red inserts Working Chronometers Lazer etched crown at 6 o'clock Solid 440 high grade Stainless Steel Solid 18k gold on 2-tone models Quad Wrapped 18k gold on all gold models Rubber Seal -O- ring 1 piece forged case construction New Rolex upgrade presidential clasp Scratch-proof sapphire crystal Large threaded screws on band Serial and model no. between lugs One-piece solid screw down crown Shock resistant movement True hologram mark Waterproof up to 30 meters Free Replica Box Set!