Sinn watch ux sdr gsg 9 ezm 2b leather the ux gsg 9 diving watches by sinn have been designed following the requirements of the german gsg 9 special forces each timepiece is characterized by perfect readability and case made of extremely durable submarine steel a date window is positioned at the 3 o clock mark additional features include temperature stabilized chronometer captive divers bezel with minute ratcheting mission timer design crown on the left side of the case luminous hands