Sinn Watch 104 St Sa I W Silicone Black 104.012 Silicone Black. Sinn watches are renowned for their aviation inspired designs, and this Sinn 104 St Sa I W 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 embraces the SW 220-1 self winding movement with 200 metre water resistance and anti-magnetic technology. The striking bidirectional pilots bezel with minute ratcheting also allows the wearer to measure and set time intervals. Housed beneath the scratch resistant sapphire crystal glass with antireflective treatment is a glossy white dial which features, like most Sinn watches, numerals, indices and hands coated in luminescence and a day and date aperture at 3 o clock.