The chronograph watch calendar function may be the simplest additional feature of the watch, it also has many types, the most common is the window type The calendar is gone.

Window calendars also have many forms of evolution, such as: There are three types of speeds from changing calendar numbers:
(1) instantaneous jump,
(2) Jump quickly,
(3) Slowly climb.

The position of the calendar window on the dial is mostly at the 3 o'clock letter, and there are other locations. The same, but more exotic is the so-called "big eyes" calendar, which is to make the calendar's ten and one digits into two dials respectively a situation shown. Such a number of characters can be made larger, without adding a magnifying glass to the watch glass.

The watch with calendar function is not complicated in structure. The main parts that make up the calendar mechanism are: calendar dial, calendar dial, calendar wheel, calendar positioning bar, calendar positioning lever spring, calendar fast dial, calendar cover and screws.

Working principle: The power is transmitted from the hour wheel, and the calendar dial wheel is rotated every 24 hours by the shifting of the calendar wheel.

There is a stud (or something like a spring) on the dial that is used to move the teeth of the calendar dial. Calendar dial has 31 teeth and characters, the calendar positioning rod is cut into the teeth of the calendar dial and is positioned under the pressure of the calendar positioning rod spring. If the voyage form is slow or fast the calendar dial and calendar dial will move slowly a little bit (from 8 pm to 12 pm).

If the taek form is instantaneous, then there will be a cam under the calendar dial, with a large lever and spring, and the lever is large in the case of compression and sudden release, the calendar dial is played over one tooth (word) in an instant.

Most Swiss Watch Factory watches can also quickly dial the calendar to quickly adjust the calendar number. Generally, when the watch is pulled out, the calendar can be quickly dialed.

At this time, the setting wheel engaged with the cross wheel will be disengaged from the steering and the calendar fast dial. The calendar fast dial is a rocking gear, that is to say, its axis is a long hole, so only the crown rotates in a certain direction. When it is under the action of the tangential force of the gear meshing point, it will get close to and bite the teeth of the calendar dial and turn it. Calendar speed dials are often few, and 3-5 teeth (the star in the photo)

At last , Luxury Watches Manufacturer advice that Please do not adjust the calendar during the period from 8:00 pm to 12:00 pm.