Abstract: The invention relates to a mechanism (5) comprising a measuring system (11, 13) mechanically connected to a display system (9) for displaying a time-related or other piece of information (2, 14). According to the invention, the display system (9) includes a quick correction device (10, 12) with an epicycloidal gear train for correcting said display of time-related or other information (2, 14) at any time while maintaining the relationship between the display system (9) and the measuring system (11, 13) during the correction phase. The invention particularly concerns the field of timepieces.

Abstract: The invention relates to a balance spring (1) including a first hairspring (3), second hairspring (5), and an attachment member (4) securing the outer coil of the first hairspring (3) to one end of the second hairspring (5) so as to form a dual balance spring (1) in series. The curve of the first hairspring (3) and the curve of the second hairspring (5) each have a continuously variable pitch and are symmetrical relative to a straight line (A) parallel to the first and second planes and passing through the median plane of projection (P) of the attachment member (4) and each hairspring (3, 5) further includes at least two counterweights (8, 8?, 9, 9?) so as to compensate for the unbalance formed by the mass of the attachment member (4) and personalise the anisochronism slope of the balance spring (1).