Watch equipped with a magnifier

Watch comprising a case provided with a watch glass and a watch movement housed in this case, the watch glass supporting an optical magnifying device provided for visually magnifying, at least momentarily, at least one element of the watch movement which is visible through this watch glass, wherein the optical magnifying device comprises at least one liquid zoom lens, this liquid lens being formed by an elastic membrane which defines a lower wall of a first part of a reservoir comprising a transparent liquid, the elastic membrane being provided under said watch glass and the first part of the reservoir being situated between this elastic membrane and this watch glass;

• wherein the liquid lens is switchable between a non-magnifying state in which the elastic membrane is substantially planar and at least one magnifying state in which this elastic membrane has a curved profile;
• and wherein the watch comprises in addition an actuator, provided in order to vary the pressure of the transparent liquid in the reservoir, and means for controlling the actuator, this actuator and the control means thereof being provided in order to be able to vary the focal length of the liquid lens and in particular to switch this liquid lens between said non-magnifying state and said magnifying state.