Dial diameter: 40 mm. Monocoque midshell. Screw-down case back and winding crown. Black monolithic Cerachrom ceramic bezel with engraved tachymeter. Tighten. Triple interlocking triple waterproof system. Scratch resistant sapphire. Water resistant to 100 meters/330 feet. Permanent, mechanical chronograph, self-winding movement. Power reserve: 72 hours. Waterproof depth: 100 meters �C 330 feet. Mirror material: Anti-reflective and scratch-resistant sapphire glass. Functions: hours, minutes, seconds, chronograph.