Abstract: Disclosed is a unidirectional clutch wheel assembly that includes a first wheel, a second wheel coaxial with the first wheel and including an inner toothing, a rigid drive member rotationally fixed with respect to the first wheel and at least one rigid pawl connected to the rigid drive member by an elastic strip. The rigid pawl is locked against the inner toothing by the rigid drive member to rotationally fix the first and second wheels to each other when the first wheel or the second wheel is rotationally driven in a direction corresponding to coupling. The inner toothing has asymmetrical teeth. The rigid pawl is arranged, in its position locked against the inner toothing, to be in point contact, in top plan view, with two consecutive teeth of the inner toothing and with the rigid drive member.

Abstract: Disclosed is a mechanism for displaying the number of the week for fitting to a timepiece movement and including a starwheel for the weeks including 52 or 53 teeth, a rocker for the weeks including a flexible finger cooperating with the toothed arrangement of the weeks starwheel upon actuation of the rocker by a driving mobile, the one driving mobile driven by one step per day by the movement and to actuate the weeks rocker once every seven days upon passing from the last day of the week to the first. The driving mobile is a driving starwheel including seven teeth, six being so-called silent teeth which are arranged not to cooperate with the weeks rocker and one tooth is a driving tooth arranged to actuate the rocker once per week upon passing from the last day of the week to the first day of the week.