MOVEMENT: swiss automatic mechanical, personalized to U-BOAT specifications. Frequency: 28,800 vibrations per hour. Power reserve: 44 hours. 26 jewels. Skeletonized rotor. FUNCTIONS: date, hours, minutes, seconds, 24h indicator. Graduated unidirectional bezel with ceramic inserts and lasered graduations and numerals, screw down crown. CASE: bronze, naturally aged, distinguishing crown on the left side, with a patented protective device. Serial number plate fixed on the left side of the case. Diameter 46 mm. BACK: screwed, in bronze with special antiqued anti-corrosion treatment. DIAL: three superimposed dials, the upper one in black with visible ruby. Luminous beige hands, numbers and markers, treated with superluminova. Red 24h indicator hand. CRYSTAL: sapphire crystal with anti-reflective coating for perfect legibility of the dial. WATER RESISTANCE: 300 mt, 30 ATM STRAP: hand made and hand finished calf leather, dark brown. Tongue buckle in bronze with special antiqued anti-corrosion treatment. Width: 22/20 mm. Strap: ref. 8554/Z Buckle: ref. 8590
