Sinn Watch 103 St Sa. 103.061 Vintage Cowhide Brown. A vintage inspired pilots watch with a whole lot of functionality, this Sinn 103 St Sa is destined to fly the skies on your wrist. Its remarkable pilots bezel is highly legible and easy to use with minute ratcheting and a luminous key mark, and with a water resistance of 200 metres, the bezel also provides capability for diving thanks to its unidirectional functionality and 60 minute scale around the edge. Measuring to 41mm in size, the case of this Sinn 103 St Sa watch is perfectly engineered for endurance and legibility. It comes fitted with sapphire crystal glass treated with anti-reflective treatment on both sides, screw down crown and push pieces and a screw fastened exhibition glass case back which gives you a view into workings of the automatic movement within. The German watch is paired with a Swiss movement, the Valjoux 7750 to be exact. This famous chronograph calibre provides a power reserve of 42 hours alongside central hands for hour, minutes and chronograph seconds, date and day of the week display and three subsidiary dials for continuous seconds, 12 hours and 30 minute counters. To complete the look of this Sinn 103 St Sa watch, the stainless steel case is paired with a matte black dial with luminous hands and indexes and a sophisticated vintage cowhide brown leather strap.