Da Vinci Perpetual Calendar Digital Date-Month, indirectly follow the “Boer Weber watch“, not only have chronography funtions but also have Perpetual calendar, large digital date and months display, digital display is one time each four years cycle design, one more innovation, functionals and easy to read. For the watch owner that means per 100 years only adjust one day, but unless those year can be divisibled by 400. After adjust in march 1st 2100, the watch owner doesn’t need to adjust the calenda within 100 years, in the satuation of less 31days calenda, the calendar also can automatic adjust, during the february of non-leap year will move 3 days to the first day in next month; at the same time, double figures months display will be move ahead, same as the common use writing of month.
IWC Da Vinci Perpetual Calendar Digital Date-Month
Movement: Cal. 89800 automatic movement
Funtions: Perpetual Calendar / stopwatch returned
Watch diameter: 44mm
Water resistant: 30 meters
Mirror: sapphire crystal, transparent caseback
This month watch, design the moment move date display, in order at the same time per month to transfer motion of chain wheel equipment, it’s operation can is process by one independance machine power reserve, during the whole month, each night the one parts motive movement will be transfer and reserved. this motive power will be released in the end of this month, except date, month chain wheel also need to move ahead. through this clever design, watch can have two big calendar disply, haughtily enter digital time. But as to technology, the date chain wheel which move one time per month have spiral cam, it’s upper is erternal operate pole. Every night, the cam will make operate pole move up until reach the highest. In the end of months, date chain wheel cam’s operate pole will fall down from the highest point, though one step to month “starting point”. This motive will lead to “move display” power reserve, send it to the procedure balance wheel. Ratchet wheel equipment ensure can forward per month.