Sinn Spezialuhren U1 B

The Sinn U1 B, reference 1010.0102, has a 44 mm German Submarine Steel case and is a dive watch. At 14.7 mm thick, the bead-blasted case is water resistant to 1000 metres. A matte blue dial places central seconds beside a date display beneath sapphire crystal. The movement is the self-winding calibre SW200-2. TEGIMENT Technology hardens the diver's bezel against scratches. That captive bezel turns in minute steps, while the case has a screw-down crown.