Montblanc Sport Chronograph Automatic 104279 Case/WR: 44 mm black DLC-coated steel sports case, 200 m water resistance Build: DLC-coated steel + convex sapphire crystal + screw-down crown + 200 m WR = proper dive-ready chrono, not just desk diver Function: Time, day-date, 12-hour chronograph + unidirectional dive bezel for timing Condition: Very good overall condition Strap Bracelet: Premium black alligator leather strap with folding/clasp-style buckle for a secure, sporty fit Case Size: 44 mm (approx. 15.8 mm thick, strong wrist presence) Movement - Montblanc calibre 4810/501 automatic chronograph (Valjoux 7750–style architecture) Reliability: Proven, widely-serviceable 4 Hz workhorse with \~46–48 h power reserve and chronometer-grade construction in this line Functions: Chronograph, Time (hours/minutes/seconds), Day, Date, Rotating timing bezel Stealthy full-black DLC case, real 200 m water resistance and a robust automatic chronograph movement make this Montblanc Sport a serious tool watch with luxury finishing. DLC stands for “Diamond Like Carbon” and is used for scores of technical applications requiring high resistance to mechanical stresses and corrosion.