Sinn watch ux s ezm 2b leather the diving watches of the ux ezm 2 b model series are the official timepieces worn by the maritime squad of the gsg 9 special forces unit one of the outstanding characteristics of this series of watches and therefore also of the ux s is our hydro technology we fill our watches with special oil that makes them non reflective underwater and completely free from fogging and also ensures that the dial can be read from any angle and because it is filled with oi