The Montblanc 1858 Automatic Date 0 Oxygen, reference MB134339, features a 41 mm bronze case devoid of oxygen, enhancing durability. It includes a fixed bezel with a brown ceramic insert and luminescent cardinal points. The grained brown sfumato dial displays white luminescent rose gold-coated Arabic numerals. Powered by the automatic calibre MB 24.17, it offers a 38-hour power reserve. The watch is water-resistant up to 100 meters and comes with a brown interchangeable sfumato calf leather strap with beige stitching.