The design of 103 chronographs by sinn resembles the cockpit instruments that pilots use its movement is valjoux automatic that performs 28 800 vibrations per hour and has 25 bearing jewels sinns dehumidifying capsule protects the dial from fogging the watch is protected from high and low pressure resistance a date window is positioned at the 3 oclock mark additional functionalities include a second time zone luminous dial elements captive pilots bezel that marks up to 60 minutes tran