U-Boat Darkmoon 40mm Vintage

This Darkmoon Vintage edition applies the collection’s signature oil-immersion concept, which floods the dial cavity with a special fluid to create a deep, glass-free three-dimensional effect, to a warmer, vintage-toned dial finish. A visible air bubble compensates for temperature changes, a recognisable trait of the line. The 40mm AISI 316L stainless steel case keeps U-Boat’s distinctive left-side crown beneath a domed sapphire crystal, with a caseback locking-ring system for quick battery replacement. The precise Swiss Ronda quartz movement is lubricated in an oil bath, and the watch is fitted on an ultra-resistant vulcanised rubber strap, rated to 50 metres of water resistance.