42mm stainless steel case, sapphire crystal back, non-screw crown with 1 o-ring, domed sapphire crystal with double anti-reflective coating, black guilloché dial, automatic chronograph Montblanc 4810/503 movement with 12 hr and 30 min counters, central chronograph hand, 24-hour display with second time zone, approximately 48 hours of power reserve, black alligator strap with triple-folding buckle. Water resistant to 3 bar (30 m).
39 mm stainless steel case, sapphire crystal back, non-screw crown with 1 o-ring, domed sapphire crystal with double anti-reflective coating, black guilloché dial with luminescent rhodium-plated feuille and batton hands, silver-colored numerals, automatic chronograph Montblanc 4810/501 movement with hour-minute-continous second hands, day-date display, 12-hour and 30-minute counters, central chronograph hand, approximately 46 hours of power reserve, black alligator strap with tiple-folding buckle. Water resistant to 3 bar (30 m).