A timepiece incorporating a mechanical movement and including a device for setting its rate, including a rotationally mobile part and a setting mobile (4) controlling the angular position of the rotationally mobile part. The setting device includes a lever (5) fitted with a linking train (6) and by a actuator button, between an uncoupled position and a coupled position. The setting mobile is kinematically joined, via the linking train (6), to a mobile (7) on a correction device, including a control arbor fitted with a crown enabling the mobile to be actuated, or to a drive mobile of an indicator which can be driven by the correction device when correcting the data displayed by the indicator to set the rate of the timepiece by actuating the button.