TOUS Now stainless steel gmt automatic watch with black silicone strap. Black mother-of-pearl face with a flat round sapphire at the bottom of the case. Crystal: round flat sapphire. Diameter: 42 mm. Interior bezel calibrated at 24 hours which rotates using the left crown. Functions: hour, minutes, seconds, GMT 24 hour hand (second time zone) and calendar. Waterproof to 10 ATM. Autonomy: 41 hours. Caliber: TIME MODULE NH34. Frequency: 21600 per hour. Japanese automatic mechanical GMT movement. Buckle closure.