MOVEMENT: swiss automatic mechanical, personalized to U-BOAT specifications. Frequency: 28,800 vibrations per hour, 4 Hz. Power reserve: 38 hours. 26 jewels. Skeletonized rotor. FUNCTIONS: date, hours, minutes, seconds, 24h indicator, graduated unidirectional bezel, screw down crown. CASE: stainless steel AISI 316L, satin hand finish, 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: sealed with seven external screws. DIAL: three superimposed dials, the upper one in black with luminous blue hands, numbers and markers. Blue 24h indicator hand. Steel brushed frame around the numbers. CRYSTAL: high quality sapphire crystal with anti-reflective treatment, lent on the date window. WATER RESISTANCE: 300 mt, 30 ATM STRAP: ultra-resistant vulcanised rubber, in black color, personalised with the logo of the Maison in relief. Stainless steel tongue buckle. Width: 22/20 mm. Strap: ref. 8351/Z Buckle: ref. 5466/SCREW
