Protected by a durable hesalite crystal and rated IP68 water resistant

while the crystal-set bezel adds a refined

we have arrived at pure simplicity

it guarantees precise timekeeping

U-Boat Watch Darkmoon 44 Imperial Blue Steel - 2021 EDITION Festina Protected by a durable hesalite2021 EDITION U Boat Swiss Made Ronda 712. 3 Quartz Movement. Lubricated with an Oil Bath. Working between 0 +60C when not worn. 44mm x 15mm 316L Stainless Steel Case Filled with a special Oil which emphasises and improves legibility on the dial. High Quality Domed Sapphire Crystal Glass with Anti Reflection Treatment. Innovative Locking System with Quick Battery Replacement. Screwed In, 316L Stainless Steel case back Blue Brushed Metal Dial with Beige