The world’s first curved chronograph movement features proprietary high-performance quartz technology with 262 kHz vibrational frequency for precise accuracy. Five-hand chronograph in rose gold-tone stainless steel case and black bezel, exhibition case back, black dial with rose gold-tone hands and markers, anti-reflective curved sapphire glass, screw-back case, black EPDM rubber strap with three-piece buckle closure, and water resistance to 30 meters.Diameter: 44mm Thickness: 10.10mm. Duet: 98R239