Chronograph Types Explained: Column Wheel, Flyback and More

A chronograph is a watch that can also work as a stopwatch. You start, stop and reset a central seconds hand with pushers on the side of the case, and small sub-dials keep count of minutes and sometimes hours. The idea is simple, but the mechanisms behind it differ, and those differences affect how the watch feels to use and what it costs to service.

The first question is quartz or mechanical. A quartz chronograph is accurate, light, and usually inexpensive. A mechanical one is driven by a spring and has a more tactile feel, and many collectors prefer its look through a display caseback.

Inside mechanical chronographs, the control system is either a column wheel or a cam. A column wheel is a small castle-shaped part that gives a smooth, positive push and is often seen as the more refined, and more expensive, choice. A cam-and-lever design is simpler and robust, and many excellent watches use it.

The way the chronograph engages the movement is the other big difference. In a horizontal clutch, gears mesh when you start the stopwatch, which can cause a tiny jump of the seconds hand and extra wear. A vertical clutch engages smoothly with no jump, and lets you run the chronograph all day without losing much power.

Beyond these basics there are a few terms worth knowing. A flyback chronograph lets you reset and restart in a single push, which pilots use for timing consecutive legs. A split-seconds or rattrapante chronograph has two seconds hands to time two events that start together. A monopusher chronograph uses a single button for start, stop and reset. A tachymeter scale on the bezel or dial turns elapsed time over a known distance into a speed.

When browsing, our spec pages list the movement and the complications of each watch, so you can filter on chronographs and compare them. Decide first how you will use it. For occasional timing, any type will do. For daily use, a vertical clutch or a quartz movement is the more practical choice.