Sinn watch 903 st b e alligator sinn watch company introduce a stunning new colour palette on the 903 st b e timepiece the unique breed from a vintage inspired navigational chronograph is adorned with a collection of wonderfully captivating yet highly practical attributes the sinn 903 st b e is purposeful to those who adore timepieces with performing analogue calculations the dark blue dial is the perfect companion for the ivory embellished indices and hands which have been treated with a l