Important Collectors’ Wristwatches an...

Hôtel Plaza Athénée - Le Trianon, Sep 28, 2005

LOT 155

?Equation of Time, Perpetual Calendar? Breguet, ?Equation of Time, Perpetual Calendar?, Automatic, No. 8525, Ref 3477. Made in the 1990s. Very fine and rare, self-winding, platinum gentleman's wristwatch with equation of time, perpetual calendar, power-reserve and a platinum Breguet deployant clasp.

USD 55,000 - 75,000

EUR 45,000 - 60,000

Sold: USD 57,500

C. Three-body, solid, polished, reeded band, gold screwed bars, transparent case back, sapphire crystals. D. Two-tone "guilloché" silver with painted radial Roman numerals on an outer plain reserve, subsidiary sectors for the equation of time and the power reserve indication, subsidiary dials for the days of the month, the months and the leap year, aperture for the days of the week at 12, secret Breguet signature. Blued steel "Breguet" hands. M. Cal. 502 QPET, rhodium-plated, hand-engraved, 38 jewels, straight line lever escapement, monometallic balance, shock-absorber, self-compensating flat balancespring, skeletonized off-center gold rotor. Dial, case and movement signed. Diam. 36 mm. Thickness 8 mm.


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Grading System
Grade:
Case: 2

Very good
Movement: 1

As new
Dial: 1-01

As new

HANDS Original

Notes

What is a Perpetual Calendar? A perpetual calendar is a calendar mechanism which, unlike a simple calendar, automatically adjusts to the correct day of the month by accounting for the varying durations of each month, as well as self-correcting for the 29th of February during leap years. Audemars Piguet are said to have been the first to produce wristwatches with perpetual calendar and moon phases, in 1924. In 1925, Patek Philippe modified a lady?s pendant watch with perpetual calendar to produce the world?s first instantaneous changing perpetual calendar wristwatch with leap year indication.