Swiss electro-mechanical movement lubricated with oil bath, personalized to U-BOAT specifications. Bidirectional inner bezel, references for the second time zone with 30 minute intervals. AISI 316L stainless steel case completely filled with a special oil that emphasises the dial, creating the illusion of the absence of glass, and an optical effect of a more intense black and higher legibility. Visible air bubble on the dial to compensate the temperature variations. Double crown on the left side, one for the time adjustment, the other for the second time setting. 45 mm diameter. Innovative locking system (Locking ring system) with quick battery replacement. Two superimposed layers dial, with rotating inner bezel. Hands, numbers and indexes treated with Superluminova in beige colour, visible tightening screws. Second time zone hand. High quality curved sapphire glass. 100 mt, 10 ATM water resistant Ultra-resistant vulcanised rubber black strap, personalised with the logo of the Maison in relief. Width: 22/20 mm. Unworn - Brand new - perfect state