Sinn watch flieger chronograph 103 st leather the 103 chronograph range by sinn has been designed to be functional and very easy to read this timepiece comes with valjoux 7750 automatic movement it performs 28 800 vibrations per hour and has 25 bearing jewels for convenience the watch has a 42 hour power reserve it comes equipped with subsidiary seconds and complete chronograph functions additional features include a day and date window at the 3 o clock mark luminous hands and numerals