Breguet. A Fine 18k Pink Gold Automatic Perpetual Calendar Wristwatch with Power Reserve and Equation of Time
Prospective purchasers are advised that several co… Read more
Breguet. A Fine 18k Pink Gold Automatic Perpetual Calendar Wristwatch with Power Reserve and Equation of Time


Breguet. A Fine 18k Pink Gold Automatic Perpetual Calendar Wristwatch with Power Reserve and Equation of Time
Signed Breguet, Classique, Ref. 3477, Movement No. 6933, Case No. 5271 1, Circa 2001
Cal. 502 finely hand-engraved pink gold automatic jeweled lever movement, eccentric pierced and engraved pink gold rotor depicting the letter B, silvered engine-turned dial with black Roman numerals on a silvered polished chapter ring, outer silvered polished chapter ring with minute divisions, blued steel Breguet hands, three subsidiary dials with silvered polished chapter rings for date, month, and leap year indication, aperture at 12 o'clock for day of the week, two fan-form sectors for power reserve and equation of time indication, circular case, coin-edged band, straight lugs, sapphire crystal display snap on case back, 18k pink gold Breguet deployant buckle, case, dial, and movement signed
36.5mm diam.
Property from an Important Private Collection
Special notice

Prospective purchasers are advised that several countries prohibit the importation of property containing materials from endangered species, including but not limited to coral, ivory and tortoiseshell. Accordingly, prospective purchasers should familiarize themselves with relevant customs regulations prior to bidding if they intend to import this lot into another country.

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Lot Essay

Accompanied by a Breguet Certificate of Authenticity dated February 27th, 2001, a Breguet presentation box, and a Breguet leather envelope.

Like many great watchmakers, Abraham Louis Breguet was fascinated by the subject and indication of the equation of time. Every watch that left his workshop demonstrated his desire to improve and perfect horology. Together with his son, Antoine-Louis Breguet, he manufactured approximately fifteen equation of time watches between 1790 and 1830.

Building on the tradition started by Breguet over two hundred years ago, the present watch takes this complication even further by adding a perpetual calendar complication with an automatic movement.

Equation of Time

A watch with an equation of time complication shows the difference between "true" solar time and "mean" solar time. The "mean" solar time refers to common time, based on a conventional twenty-four hour period, while "true" solar time actually varies with the earth's irregular orbit around the sun. These two times match precisely only four days each year.

The equation of time in astronomy is the quantity that needs to be added or subtracted to switch from real time given by the sun, to the mean time; our time, which arbitrarily divided a day in 24 hours. The equation of time varies from one day to another, its value swings between around -16 to +16 seconds per day. By cumulating these differences, we obtain a variation between the real noon and the mean noon of more or less 15 minutes. The most important differences are, function of the years, toward February 12 (+14 minutes and 59 seconds) and November 3 (-16 minutes and 15 seconds). The difference is zero toward April 15, June 15, September 1 and December 24.

In this day and age, the equation of time complication is a rare and desirable feature on a fine complicated watch. For the appreciator of clock and watchmaking history, a timepiece that highlights the equation of time is an opportunity to own a significant example.


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