Zenith 18.9000.9004/78.R585
Zenith DEFY Peak Series, one-hundredth of a second chronograph, model: 18.9000.9004/78.R585, 44mm case diameter, fully skeletonized dial, front balance wheel, power display. Paired with the self-produced 9004 high-frequency movement, this movement has a frequency of 360,000 vibrations per hour (50 Hertz), which is ten times that of its predecessor, the El Primero. This enables the timing accuracy to reach 1/100 second, with high-precision timing. The chronograph second hand rotates once per second, which is truly a wonder. The entire set was not used.