Stronger, bolder and more powerful design, 1/100th of a second Chronograph movement, Exclusive dynamic signature of one rotation per second for the Chrono hand, 1 escapement for the Watch (36,000 VpH - 5 Hz) ; 1 escapement for the Chronograph (360,000 VpH - 50Hz), Certified Chronometer, New Interchangeable strap system, 2 straps included : 1 Rubber with folding buckle & 1 Velcro. Sapphire dial, Screwed-in crown.