Chronograph watches are easy to spot, thanks to the two pushers, often flanking the crown at 2:00 and 4:00. Whether it’s a standard mechanical timer or a flyback complication, pushers almost always come in pairs.
However, it wasn’t always this way, and the original single-button system has its merits, despite being few and far between these days.

Dating back to the 1930s, chronograph complications were operated initially with a single pusher, known as a monopusher, to start, stop and reset the timer. Eventually, the two-pusher system was developed to break up the mechanism and make it more reliable, but it sacrificed the convenience of one-handed operation.
Vulcain is one of the brands keeping the old single-button system alive with the compact, slightly dressy Monopusher Heritage. It is based on a 1950s design used by a legendary match timer for Real Madrid, and has a faithful mid-century dial.
A lone bumper at 2:00 essentially functions like a flyback chronograph, but without the flyback feature. It allows the wearer to start, stop and reset the chronograph with one finger.






