Montblanc’s new Iced Sea Automatic Date 0 Oxygen ref. MB137541 arrives as a 41mm black dive watch with a deliberately pre-aged, dark-gray distressed look priced at €5,300, $5,600 or £4,600.
Mont Blanc stones create that finish: the black-coated steel case and bracelet are tumbled to produce a worn patina, while the oxygen-free case is designed to prevent condensation and slow oxidation in extreme conditions.
The watch keeps the Iced Sea line’s functional specs, including 300-meter water resistance, a unidirectional ceramic bezel, quick-release bracelet changes and a glacier-pattern dial that takes 30 days to make.
The review praises the rugged 1970s-inspired aesthetic, legibility and comfortable bracelet, but says the automatic MB 24.17 movement—essentially a Sellita SW200 with a 38-hour power reserve—feels weak for a watch above €5,000.