Inspired by 'Minerva' styles from the '20s and '30s, Montblanc's '1858 Geosphere' reference celebrates the spirit of mountain exploration. Dedicated to the Seven Summit mountaineering challenge, it's designed with a robust stainless steel 42mm case and matching bracelet strap. Inside, a MB 29.25 automatic movement powers the black dial featuring hour and minute hands as well as a second time-zone sub-dial and two 24-hour Northern and Southern hemisphere sub-dials with day and night indicators, where the seven summits are pinpointed with red dots. We offer a two-year warranty for all working parts and manufacturing faults for luxury watches. For more information, contact one of our experts by emailing watches@mrporter.com Details & Care Movement - Swiss-made caliber MB 29.25 automatic movement with 42-hour power reserve - 26 jewels, 28,800 Vph Functions - Hour and minute hands - Date window - Second time zone (GMT) subdial, 24-hour Northern and Southern hemisphere subdials with AM/PM indicators Dial - Black dial - Beige luminescent hands, indices and Arabic numerals - Case - Stainless steel case - Black bidirectional ceramic bezel - Crown for date and time adjustments and manual winding - Sapphire glass crystal - Engraved case back - Folding clasp-fastening stainless steel bracelet Specifications - Case diameter: 42mm - Water resistance: 10 bar - Comes in a presentation box - Reference number: 125872