Sinn Watch Flieger Chronograph 103 St Sa 103.061 Leather Sinn watches are renowned for their aviation inspired designs, and this Sinn Flieger Chronograph 103 St Sa watch continues this tradition by bringing to life an aesthetic reminiscent of cockpit navigation clocks and their rapid and clear readability. The polished stainless steel case and ratcheted pilots bezel embrace the Valjoux 7750 self winding movement which equips the watch with hours, minutes and subsidiary seconds, a date and day of the week display and chronograph function. The automatic mechanism also boasts 25 bearing jewels, 28,800 semi oscillations per hour and shock and anti magnetic resistance. Housed beneath the scratch resistant sapphire crystal glass with antireflective treatment is a striking matte black dial which features, like most Sinn watches, numerals, indices and hands coated in luminescence for easy legibility even at night. This Sinn 103 St Sa watch has also been tested to meet the technical requirements for waterproofness, promising a water resistance of 200 metres.  To complete the look of this aviation inspired timepiece, a classic black leather strap and stainless steel buckle is added.