A mouth full: the Bovet Récital 20 Astérium 10-day Flying Tourbillon Night Sky Annual Calendar with Astronomical Functions
The equation of time is the difference between true solar time and ‘our time’. In short, this is because the orbiting of the sun in relation to other planets, including earth, isn’t exactly corresponding with our time. This has to do with the position of the sun related to the axis of the earth; the turning of the earth around the sun is not an exact circle but an elliptical trajectory.
The earth, not only turning around the sun but also turning around its own axis, is a little flatter and wider than a perfect round. That is why the time of nature is either ranging from -16 minutes and 23 seconds on November 4th to +14 minutes and 22 seconds on February 11th. It is called the “equation of time”. Some of the most high-end watches have a complication to show the equation of time.
Equation of time
The Breguet Marine Equation Marchante 5887 offers a couple of outstanding complications, the eqation of time is one of them
The Vacheron Constantin Les Cabinotiers Celestia Astronomical Grand Complication 3600 is the most complicated wristwatch ever made by VC
The history of the Longines Lindbergh Hour Angle Watch by Charles A. Lindbergh and Longines after the first transatlantic crossing