The Power Reserve: What Is It and Why Does It Matter?

The power reserve is the length of time a mechanical watch keeps running after being wound, without any further intervention. In practical terms, the longer the power reserve, the longer you can leave your watch at rest without it stopping. This is an essential factor to know before choosing an automatic watch, as it directly shapes your everyday use of it.

How an Automatic Watch Winds Itself

An automatic watch winds itself through the natural movements of the wrist, which drive an oscillating weight inside the case. This energy is stored in a barrel, in the form of a spring that is progressively tensioned, then released steadily to drive the hands. The power reserve corresponds to the time this spring takes to fully unwind once the watch is still. It depends directly on the design of the movement and the care taken in assembling it, a craft we cultivate in our workshop.

Why This Detail Changes Your Daily Experience

A short power reserve means winding or wearing your watch almost every day to keep it running on time. A longer reserve offers greater freedom: you can set it aside for a weekend or alternate with another piece without having to reset the time when you pick it up again. This is a factor worth considering as much as the dial's aesthetics or the shape of the case, since it directly affects how enjoyable a mechanical watch is to live with.

Automatic or Quartz, Two Different Philosophies

Quartz watches do not face this issue: powered by a battery, they offer several years of autonomy without any intervention. An automatic watch, meanwhile, offers a different experience, one that feels more alive, with energy coming from the wearer. This choice is above all a matter of sensibility: some seek the silent precision of quartz, others the mechanical connection of a movement that only comes alive through motion.

Whichever movement you choose, every Maison Montignac watch comes with a two-year warranty and the craftsmanship of our Besançon workshop, which ensures every piece keeps time reliably. Browse our collections to find the movement that matches your pace of life.