Da Vinci perpetual calendar digital date watch , indirectly inherited " Boerweibo watch " , in addition to timing functions have also calendar , large digital date and month display , digital display of the four-year leap year cycle design , multi- An innovative, practical , and legible. This watch paragraph owners, this means that every 100 years to adjust the day, but except for the year is divisible by 400 . In the March 1, 2100 the day after adjustment , the watch owner are no longer need to adjust the 100 years the calendar . In less than 31 months , the calendar can be automatically adjusted , while in non- leap year by the end of February will be moved forward three days to the first day of next month ; the same time, two-digit month show will move forward With the general wording of the same month.
Platinum materials / Cal. 89800 automatic movement / perpetual calendar / chronograph function returning / watch diameter 44mm / waterproof 30 meters / sapphire crystal , transparent case back / limited 500
Clear window display design Qudai pointer , so the mechanical space requirements also obviously Congress, much attached to the movement on the body of the calendar module , an additional store of the machine Dong Li , so that the two windows at the end jump for Riqi time , There are still plenty of momentum , while not affecting the movement of the swing , maintain a certain accuracy.
Mechanical power reserve to ensure reliable switching
Watch this month , beating an instant date display is designed to be carried out at the end of each month at the same time mobile devices convert the two wheel action , its operation is independent of the mechanical power by a reserve for , throughout the month period , per night with Date to replace a small part of the power is converted and stored . This power will be released at the end of the month , in addition to dates, the month of Roulette have to move forward . Through this ingenious design , watch the calendar can be displayed with two large march into the digital age . However, the technology is concerned, the date of the monthly rotating chain wheel with a spiral cam , which for the extra joystick . Per night , Cam will stick slightly moved upward, to the end of the highest points . At the end , the date on the cam chain wheel joystick fell from the highest point , after a month of stairs to the " starting point . " This action lead to " beat show "Save power , sent to the display of the program month balance wheel . Ratchet device to ensure that only a month before pushing.
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