Calendar display device for mechanical wrist watch, has direct kinematic link between disk of months and disk of days or dates for automatic indexing between inscriptions on disk of days or dates and inscriptions on dial depending on month

摘要

The device has a disk (1) of days and a disk (2) of dates respectively carrying inscriptions symbolizing days of a week and a date of a month. One of the disks acts as a dial with an aperture (2.1) allowing the dial to see inscription of current month on a disk (3) of months. A hand (4) is placed concentrically and rotatively relative to the dial to indicate the date and day. A direct kinematic link between the disk of months and the disk of days or dates makes automatic indexing between the inscriptions on the disk of days or dates and inscriptions on the dial depending on the month.