Innovative Patented crown release system at 8 o'clock for easy time and date setting. U-Boat U28 Swiss Made Automatic Movement with a Frequency of 28,800 vibrations per hour, 4 Hz. Power reserve of 38 hours - 26 Jewels. The movement is modified and personalised to U-BOAT specifications, with date display with cyclops. Stem position at 9 o’clock. 46mm x 16mm 316L Stainless Steel Case - Distinctive crown on left side with patented screw down protection device. Uni-Directional bezel. Serial number engraved on a small plate fixed to the side of the case. High Quality Sapphire Crystal Glass with Anti-Reflection Treatment Black Dial with Beige numerals, hands and markers, treated with Beige Superluminova. 24h indicator hand indicating AM/PM. Visible Ruby at 6 O'Clock Screwed in 316L Stainless Steel case back 22mm Bracelet 316L Stainless Steel Links with screw-in adjustments instead of pressure pins - Deployment clasp with 3 easy micro-adjustments and U-shaped detail - Laser engraved logo on the two initial links and on the clasp. Water Resistant to 300M 30ATM