Movement Mechanical hand winding, personalized to U-boat specifications for stem to be positioned at 9 o'clock, diameter 36,60 mm. Shock absorber Incabloc, Cotes de Geneve decoration and blued screws, visible rubies. Frequency 18.000 vibrations per hour, 2,5 Hz. Power reserve 46 hours. 17 jewels, height 4,5 mm. Functions Hours, minutes, small seconds at 3. Case Sand blast finish steel 316L AISI, with subsequent treatment of coating PVD to guarantee maximum durability to wear and scratch. There are 8 steel screws which lock up the back case from the upper side. Serial number engraved on the right hand side of the case. Crown at 9. Diameter 50 mm. Thickness 15,00 mm. Weight 140 g approx. Back See-through, with exclusive steel grate. Dial Black with luminous superluminova hands. The dial of this model is made up of two superimposed dials: one white treated with superluminova and coloured pigments added and the other one cut, treated with composed opaque black pigments. Available with red or black glass. Strap Black in rubber (hypoallergenic) with calf inset. Width 26/20 mm. Tongue buckle with U-Boat personalization. Water-resistance 100 metres,10 ATM.