A setting system for a universal wristwatch (1), the setting system comprising:
- an outer fixed winder (A) graduated in both twelve (12) hours and 60 minutes that shows hours and minutes;
- a smaller 24-hour graduated dial (B) with internal and concentric numbering increasing clockwise and making one complete turn clockwise in 24 hours;
- an inner time zone dial (C) completing clockwise two turns a day, concentric and internal to the winder (A) and the 24-hour graduated dial (B);
- a planisphere represented on a surface of the time zone dial (C) with the South Pole in the middle;
- twenty-four (24) equidistant peripheral hands subdividing the planisphere and showing a time of each of twenty-four (24) corresponding time zones in which the planisphere is subdivided;
- an hour hand (O) mounted on an hour shaft (10), the hour hand completing two turns clockwise in 24 hours;
- a minute hand (M), completing one turn clockwise each hour, the minute hand showing the minutes, identical for all time zones;
- a gear kinematic chain (r1, r2, r3, r4), wherein the hour hand (O) rotates by the hour shaft (10), and the hour shaft (10) transmits by the gear kinematic chain (r1, r2, r3, r4) motion to 24-hour graduated dial (B),
- one gear (r4) of the gear kinematic chain being integral with said 24-hour graduated dial (B) with a gear ratio of 2:1, so that to each turn of the hour shaft (10) corresponds a half turn of the 24-hour graduated dial (B);
- a coupling (12), wherein the time zone dial (C) is coupled to the hour shaft (10) by the coupling (12);
- and
- a coaxial and external selector (11), wherein the coupling (12) is turned by the selector (11) through a sliding pin (13) which extends from the coupling (12) and engages in a groove (14) of the selector (11),
- said selector (11) being connectable to another gear (r1) of the gear kinematic chain, wherein each turn of the hour shaft (10) corresponds to a turn of the time zone dial (C), confirming the ratio 2:1 between the 24-hour graduated dial (B) and the time zone dial (C),
- said selector (11) being detachable from said coupling with the another gear (r1) and settable to the one gear (r4) in order to implement a connection between the rotation of the time zone dial (C) and the 24-hour graduated dial (B),
- wherein during said connection, the time zone dial (C) and the hour dial (B) realize an identical synchronous rotation for enabling to set the hour hand (O) on a new place and to obtain at a same time and independently collimation with the joint unit of the 24-hour graduated dial (B) and the time zone dial (C), thereby showing a local time in twelfths and twenty-fourths,
- the selecting devices (11) being repositionable to an original configuration, after completing the collimation, to thereby restore a previous ratio between the 24-hour graduated dial (B) and the time zone dial (C).