The invention concerns a toothed correction gear train (33, 34), engaged with angular positioning means (35), kinematically linking step-by-step driving members (14, 15) of display members, with a gear train (19, 20) indicating time zones, teeth (34) of said correction gear train being engaged with an impulse finger (36a) of a correction lever (36), in neutral position of said lever, corresponding to its return spring (37) release, the path described by said lever (36), to bring it in its other limit position, passing through one of the teeth of said correction gear train (34), said path being selected so that said tooth is reset in its initial angular position once said lever (36) displaced in its other limit position, the return of said lever into its neutral position by said return spring release, causing said teeth of said correction gear train (14) to be driven by one step by the impulse finger (36a).