Sinn Watch 103 St Diapal Vintage Cowhide Brown. 103.0616 Sinn watches are famed for their aviation inspired designs and this Sinn 103 St Diapal 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 luminous pilots bezel measuring to 41mm house the Valjoux 7750 GMT self winding movement which equips the watch with hours, minutes and subsidiary seconds, a second time zone based on a 12 hour basis, a date 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 charcoal grey dial which features, like most Sinn watches, numerals, indices and hands coated in white luminescence for easy legibility even in the dark. This Sinn 103 St watch also showcases Sinn’s famous DIAPAL technology which keeps the escapement within the movement lubricant free, ensuring long-term accuracy of the movement and particularly of the Swiss anchor escapement. To complete the look of this Sinn pilot watch, a vintage brown leather strap and stainless steel buckle is added.