Monza Caliber 12 chronographs are automatic, two-register chroographa, with black dial and registers; 12-hour recorder; Date at 6 o'clock; Tachymeter and pulsations scales on inner bezel

Monza Caliber 15 chronographs are automatic, two-register chroographa, with black dial and registers; 30-minute recorder; Date at 6 o'clock; Tachymeter and pulsations scales on inner bezel