The present disclosure relates to a watch mechanism having a first actuating device, a second actuating device, a first pivoting piece arranged to cooperate with the first actuating device and to pivot about a first axis perpendicular to a first principal plane, a second pivoting piece arranged to be connected to the first pivoting piece and to pivot about a second axis to a second main plane, a first flexible blade being connected to each pivoting piece, a mechanical pivot having a main axis offset in the first main plane and/or in the second main plane from the axis of rotation of the first pivoting piece and the second pivoting piece, the first pivoting piece and the second pivoting piece being mounted on said mechanical pivot, thereby preloading the first flexible blades.