Extra-large subdials for ease of readability and better visuals in all sports situations.
The second hand "sweeps" similar to a mechanical movement and is more precise for elapsed time measurement. Technically, Miyota used fine-tooth “velvet wheel” for turning of the second hand – as is traditionally used in all mechanical chronographs.
4 years of battery life (not special - regular battery) resulting from technically perfect kinematic scheme with minimal friction in a big sub-dial watch.
Split-second (1/30 of a second), seconds and 60-minute summing action
Between 4 and 5 O'clock Position
15 Tritium tubes with 13 countersunk below the dial for constant illumation without charging in the sun.