Vacheron Constantin presents the Patrimony Traditionnelle Calibre 2253 watch in the Collection Excellence Platine. This model features a major astronomical complication in terms of technical application. Only 10 units will be limited on sale.
Vacheron Constantin is one of world’s oldest and most prestigious watch companies, presented four exceptional platinum novelties from Patrimony collection. The equation of time is probably the most fascinating complication in this outstanding model. Its purpose is to indicate the difference in minutes between the variable solar time shown by a sundial and the constant mean time of clocks and watches.
For practical reasons, mankind has divided each year into 365 and a quarter days, each day into 24 hours, and the hours into 60 minutes each. However, because the Earth’s orbit is elliptical rather than circular, the time in relation to the sun varies daily. The noon zenith of the sun when it crosses the observer’s meridian seldom occurs at exactly 12 o’clock by his watch.
In fact solar time and mean time coincide just four times a year – on April 15, June 14, September 1 and December 24. For the rest of the year, the difference between solar and mean time varies from minus 16 minutes to plus 16 minutes. The oldest clock showing the equation of time was made by the mathematician Nikolaus Mercator in the 17th century. It enabled folk to covert the sun’s varying noon to the standard constant time shown on their watches.