The Seiko VK64 is a hybrid movement. It combines a quartz module for time-keeping, and a mechanical module for the chronograph function “meca-quartz”. The quartz provides super accurate time-keeping, low maintenance, and it keeps the cost affordable. The long chronograph sweep second ticks 5 times per second, providing high precision and a smooth rotation around the dial. The start, stop, and reset buttons have a mechanical feel, and they instantly reset the chronograph hands to zero like a purely mechanical chronograph would do.