Monopusher Chronograph
A monopusher chronograph runs its start, stop and reset functions through a single button that cycles through them in turn. On many monopushers this button is built into the crown, coaxial with it, giving the watch a tidy case profile, while others place it on the case at the 2 o'clock position. It harks back to the early days of the chronograph and lets you time only one continuous event at a time.
At a glance
- Control
- One button cycles start, stop and reset
- Placement
- Often built into the crown, coaxial with it, or at the 2 o'clock position
- Limit
- Times one continuous event at a time
On a monopusher chronograph, start, stop and reset all run through one button in a fixed order. The first press sets the timing going, the second halts it, and the third sends the hands back to zero. On many monopushers that button is built into the crown, coaxial with it, which gives the watch a tidy case profile, while others place it on the case at the 2 o'clock position.
Why a single button
In the chronograph's early days this was the standard layout, and the two-pusher arrangement only came along later. A single control is a visually spare choice that stays close to the roots of the chronograph mechanism, before separate pushers became common.
What it does and does not do
- Strength: when the button is coaxial in the crown the case lines stay clean, and operation flows simply from one button
- Limit: you time a single continuous event; you cannot stop and resume, since the next press goes to reset
To reset and restart the timing of consecutive single events in an instant you would reach for a flyback chronograph. To take split times or run two events in parallel you would want a rattrapante (split-seconds) instead. You can see where these functions sit in the wider family in our guide to the best chronograph watches.
Examples
When you want to time a single run from start to finish, one button is enough: press to start, press to stop when it ends, then press to reset. If you want to capture a lap split partway through, this layout falls short, because the second press already goes to stop.
A single button built coaxially into the crown leaves the side of the case smooth, which is part of why a monopusher chronograph appeals to anyone after a clean, classic look.
Comparison
The single-button and two-button layouts do the same job with different flexibility.
| Option A | Option B | Notes |
|---|---|---|
| Monopusher chronograph | Two-pusher chronograph | One button cycles start, stop and reset, so you cannot stop and resume. With two pushers, start/stop sits on one and reset on the other, which lets you pause and restart before zeroing. |
Related terms
Frequently asked questions
How does a monopusher chronograph work?
A single button works in a fixed order: the first press starts the timing, the second stops it, and the third returns the hands to zero. That button is often built into the crown, coaxial with it, so the side of the case stays clean, though some models place it on the case at the 2 o'clock position.
What is the difference between a monopusher and a two-pusher chronograph?
On a monopusher, start, stop and reset cycle through one button, so you cannot stop and resume. On a two-pusher, start and stop sit on one button and reset on the other, which lets you pause and restart the timing.
Can a monopusher chronograph take split times?
No, a plain monopusher chronograph times only one continuous event. To take split times or run two events in parallel you need an added complication such as a rattrapante (split-seconds).