Aerowatch Technical specifications Further information Item number a 61989 AA07 1/2 sq Movement automatic chrono 13 1/4''' Valjoux 7750, 25 jewels, semi-skeleton, hours, minutes, seconds and date at 3 o'clock, 30-minute counter at 12 o'clock and a 12-hour counter at 6 o'clock, 48-hour power reserve Dimensions Bandwidth 22.00mm, total height 15.00mm Diameter 44.00 mm Strap Blue leather, 22.00mm, folding clasp Case Satin-finished and polished stainless steel, domed anti-reflective sapphire crystal, exhibition back Dial Blue skeleton ring, luminous hour markers and hands Water resistance 50m