Sinn watch 240 st leather culminating elegance with a professional air of clarity the sinn 240 finished on a stunning black cowhide strap with integrated bead blasted stainless steel buckle and contrasting white seam echoes the brands strive for excellence and boldness stamped with the brands distinguishable attributes of workmanship throughout its design and blueprint and with an interior pilots bezel and a day date function this watch unites the basic functions of an everyday watch with