Sinn watch u1000 sdr ezm 6 leather the sinn u1000 sdr watch is a diving timepiece coming with various hi tech features and exceptionally tough casing the case of the watch is made of german submarine steel that is protected from high pressure magnetic fields and seawater penetration sinns tegiment technology is used to make the case harder a dehumidifying capsule keeps the dial from fogging and protects the mechanism u1000 sdr is equipped with various functionalities like a captive safet