The present invention relates to an inverter device for a clock movement comprising first and second gears (51, 52), intended for being driven in opposing, coaxial directions of rotation and a toothed output member (67), intended for being kinematically connected to a pivoting member (40) of the clock movement. The gears are connected to the output member by unidirectional transmission members (56, 57), arranged such as to transmit a rotation to the output member in a single predefined direction of rotation and to prevent a rotation of the output member from being transmitted, in said predefined direction of rotation, to one or both of the gears. Each unidirectional transmission member (56, 57) comprises two teeth (58, 59), diametrically opposed and asymmetrically shaped, and is connected to the output member (67) such as to be rotatably secured thereto while being suitable for moving between first and second end positions in a radial direction. Each gear (51, 52) comprises a panel (2) provided with a central countersink (5) defining a housing for the corresponding unidirectional transmission member (56, 57), the periphery thereof having n peripheral tips (53, 54), intended for engaging with the teeth (58, 59) of the corresponding unidirectional transmission member in the predefined direction of rotation, each being defined by the intersection of a circular hole (8) with the periphery, where n is no lower than one.