Perpetual or annual calendar watch comprising a mechanism for the display of the number of days in the current month

摘要

The timepiece has a month cam (5) including a movable indicator unit (13) for indicating a number of days in a month, which can be moved with respect to a fixed indicator unit. A linkage connects the movable indicator unit to the month cam such that the movable unit occupies a position characteristic of the month cam with respect to the fixed indicator unit during each month.