Sinn watch t1 b ezm 14 leather strapthe t1 b is a mission timer all of the case parts are made from bead blasted high strength titanium characterised by a matt blue electroplated dialtitanium has a particularly low weight very high strength and exceptional resistance to saltwater so it is perfectly designed for use in saltwater the metal also offers a high degree of wearing comfort as it causes no allergiesa further special feature of the t1 b is the captive safety divers bezel which