Caliber: https://v.gd/XXFRyn link BVL 318 for the Chronograph and BVL 138 for the Automatics Functions: Hours, minutes, small seconds, power reserve, and local time https://v.gd/nNyKQM link zone for the Chronograph. Hours, minutes, seconds, power reserve for the Automatics Thickness: https://is.gd/Eihzh0 link 3.3mm and 2.23mm Power Reserve: 60h Winding: Automatic for all models