Sinn watch 903 st silver leather you will instantly notice that the dial of the 903 st silver watch comes with numerous details more than 30 steps are needed for the production of this fine dial a date display is positioned between the 4 and 5 o clock marks the navigation chronograph is one of the most prominent features of this 903 timepiece it can be used to do conversions calculate proportions and performs multiplications and divisions additional functionalities include an inner bezel w