
Mechanical watches have no computer chip that can spit out information; mechanical watches rely solely on the ingenious crafting of tiny parts working in a symphony of movement. In light thereof, our Gregorian Calender with months of 28,30 or 31 days prove quite a challenge to watchmakers, not to mention the leap years. Most watches have a simple calender that must be manually adjusted five times a year after each month with 31 days. The Perpetual Calender, on the other hand, will display the correct date, taking into account the different day lengths and the leap year. To accomplish this task, the movement draws on a “mechanical memory” of 1,461 days or four years. A majority of the Perpetual Calender mechanisms utilize a differential gear mechanism from the hour wheel. This mechanism can be comprised of several hundred gears, levers, and other parts. But, be assured that for less than a million and a half bucks, you too can possess a rare and accurate timepiece.....An option, however, in my thinking....would be to get a $260 quartz watch that can perform these functions even more accurately....and, consequently, donate the money you've saved to charitable causes...or your friends and family......
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