The Montblanc 1858 Automatic Date 0 Oxygen is housed in a 41 mm bronze case totally devoid of oxygen. It is completed by a fixed bezel with brown ceramic insert and luminescent cardinal points. The case back features the “Spirit of Exploration” special engraving. The timepiece is powered by the automatic caliber MB 24.17 and comes with a grained brown sfumato dial with white luminescent rose gold-coated Arabic numerals. It is fitted with a brown interchangeable sfumato calf leather strap with beige stitching.