In watchmaking, the reserve of power refers the time that can continue to operate the mechanism of themechanical watchwithout it being reassembled or scope. The term only applies to the watches pulling their energy from the voltage of a spring as opposed to Quartz watchesoperating using a battery. When the power reserve is exhausted, the mechanism stops. It is then necessary to go up the watch and put it back on time.
When talking about the watch for watchmaking, it is also to designate the indication of this reserve of power on the watch dial. This information is given by the needle and comes between a "zero power reserve" position and "maximum power reserve". The power reserve is a complication that can be useful for people who really need their watch for their activities and who want to ensure that the operation of the watch remains optimal. Indeed, a watch whose power reserve is close to zero will very quickly lose precision and take late. However, the watch today is more than an accessory than a utility object, the interest of the power reserve indicator on a watch is above all for the pleasure of the eyes!