Sinn watch u200 ezm 8 silicon u200 watches are a relatively new addition to sinns diving timepieces collection the line was launched in 2010 to feature a smaller dial and lower weight sinn diving watches have one special feature they are made of submarine steel which is pressure resistant anti magnetic and seawater resistant the watch is equipped with sinns special dehumidifying technology a date window is positioned at the 6 o clock mark additional features include a crown at 4 o cloc