The original ball pulsemeter timepiece was designed for the needs of doctors the trainmaster pulsemeter cosc watch builds upon that first idea it is equipped with valjoux 7750 automatic calibre that is certified by contrle officiel suisse de chronomtres cosc the official swiss institute that tests chronometers the movement performs 28 800 vibrations per hour and has 25 bearing jewels hands and indices are illuminated through the use of 18 self powered micro gas tubes that glow 100 time