Sinn watch u200 sdr ezm 8 bracelet the u200 sdr diving watch is relatively smaller and coming with lower weight while maintaining all of the features that other diving watches from the range have sinns diving watches are made of submarine steel that is protected from high pressure magnetic influences high and low temperatures and seawater penetration the watch is also equipped with sinns dehumidifying technology a captive divers bezel with minute ratcheting crown at 4 o clock mission