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for a watch collectors, if the clocks do not understand the various functions it is difficult to say better collection and identification of watches and clocks. Watches fascinated us most about where it should be able to reflect the inherent complexity of its mechanical body functions, and functions to some extent the amount is the main criteria to measure the value of watches and clocks. As multi-function table are usually produced by the famous watch factory, and the complexity in the production process, so often become the most sought-after collection of watches and clocks, one of the categories.
20 mid-century, many complex function has been applied successfully in the watch,[link widoczny dla zalogowanych], such as calendar, world time,[link widoczny dla zalogowanych], playing spring timekeeping,[link widoczny dla zalogowanych], Dual time sub-seconds, etc., may seem today, these watches are not too special , but in a few decades ago, the first work created by the multi-function watch is really earth-shattering, they not only become a classic watches and clocks, but also watch collection area one of the greatest potential.
multifunction timer (chronograph) usually has two sets of timing device,[link widoczny dla zalogowanych], in which a set of normal time to go, the other a separate record for a specific period of time used, the surface is different time record set. In 1915, Breitling developed the first chronograph; 1947,[link widoczny dla zalogowanych], Deng Xiao Du He launched a \) in the dial that the moon has a small window, as if the same people use the lunar calendar, according to the moon to be able to determine the date of the change.

play spring timekeeping (repeater) is usually passed on the case button or dial the handle, you can start the audible range of devices to report at the time. In 1892, Omega watches launched a three-Q function.

calendar (perpetual calendar) can indicate the month, week , calendar, and some have the year and leap year display and automatically adjust the size of the date of the month. In 1925, Patek Philippe launched the first watch with perpetual calendar.

power reserve (power reserve) to show the extent of the energy winding mechanical watches, display type can be divided into Pointer and window type.

time zone (timezone) can display two or more than the world time zone . In 1953, Tissot launched the first world time zone display with automatic watches.

Tourbillon (tourbillon), is the mechanical clock in the \device itself can also run with a 360 degree rotation, minimizing the effects of gravity, improves the accuracy of travel time. So watch only a few manufacturers and individuals to make such a complex organization.

Grand Complications (grande complication), is a variety of functions together an overview of the complex. In 1991, Blancpain launched with tourbillon, perpetual calendar, spring and two seconds to play sub-timer function of the \\