Gear wonderful 365 days a year 48 months, divided into 12 months, 12 months, 7 months, 31 days, 4 months 30 days, 1 month is 28 days or 29 days. This depends on a number of complex algorithms if the operation of gear sizes, calculation, and stuffed inside a small case, one can imagine the difficulty of their works. This is why so few number of calendar watches, the price is always high but the reason. Perpetual calendar watch movement can be divided into two parts, one charge of hours, minutes, seconds, average time-work, just as a set of astronomical another part of the self-propelled model, which to a micro-satellite gear system operation, the whole system rotates take four years. The core component is called the "48 month gear." "48 month gear," the name suggests, is engraved with 48 months of detailed data on the calendar component is a gear 48 scale slot to read the data to fix the calendar display.
Calendar table in addition to the various brands of various shapes, surface design are different, but there is a common limitation is the accuracy of dates only to 2100. This is because all of the perpetual calendar movement is only four tenths of the calculation, the calculation can not be further "non-leap years, but every four years to leap," so complicated formula. So in the calendar sheet between 1901 to 2100 will correctly indicate today is the day of the month, but by March 1, 2100 the day, your calendar will show the table February 29, you should take the trouble to manually it appropriated March 1, then you can not adjust and then 100 years (2200 is not a leap year). And 100 years or 400 years, the arrangement seems to adjust the time to write in his will in. Never stop the pursuit of mankind, although this "mission impossible" to rely on machinery has not been a breakthrough, but in a practical and beautiful on the calendar, all companies are concentrated study. Such as Blancpain watch in complex areas, created a device hidden in the table will be adjusted under the new invention of the ear, beautiful and practical. Blancpain, the world's thinnest perpetual calendar component, has become a legend of the connoisseur in mind. And have the world's first patented quick adjustment device Athens GMT ± Perpetual Calendar watches are available all the features of a single crown adjustment, and does not function because of the complex showing dazzling appearance, its clean and simple dial out, or even the first people one would suspect that it is not a calendar.
48 month gear structure is very interesting, the gear side of the scale there are shades of groove, and some deep trough, and some only the scale there is no data slots, each data record of the calendar scale are the display rules. Calendar is based on the gear lever to the 48 slots of data to accurately rotate automatically display the current month, day. Modern calendar watch as the designer's clever mind conceived, designed the 48 months of data recording gear and more functions, so that the table 400 years after the calendar need to be adjusted again, this is a great improvement on the structure, but the basic principles The same 48 months or in accordance with the basic gear to be set.
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