Important Watches

Geneva, Mar 20, 2010

LOT 165

Ap Tourbillon No. 24 Audemars Piguet, Genève, "Automatic Tourbillon with Power Reserve", No. 24, case No. D 35926.Made in the 1990's. Very fine and rare platinum wristwatch with visible one minute tourbillon regulator, 60-hour power reserve indication, date and an 18K white gold Audemars Piguet deployant clasp. Accompanied by an Audemars Piguet box.

CHF 45,000 - 55,000

USD 42,000 - 50,000 / EUR 30,000 - 38,000

Sold: CHF 50,400

C. Three-body, solid, polished and brushed, case back secured with 6 screws, brushed flat band, rounded stepped bezel, teardrop lugs, back winder, sapphire crystal. D. White lacquer, with off-center subsidiary dials; at 12: hours and minutes with painted radial Roman numerals, at 3: days of the month, at 6: aperture for the tourbillon cage, at 9: 60-hour power-reserve graduation. Burnished steel feuille hands for the time, blued steel épée hands for the date and power reserve. M. Cal. 2875, rhodium-plated, oeil-de-perdrix decoration, 41 jewels, titanium tourbillon cage, monometallic balance, selfcompensating flat balance spring. Dial, case and movement signed. Diam. 39 mm. Thickness 10 mm.


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Grading System
Grade: AAA

Excellent
Case: 2

Very good
Movement: 2*

Very good

Overhaul recommended, at buyer's expense
Dial: 1-01

As new

HANDS Original

Notes

What is a Tourbillon ? A Tourbillon is a regulating mechanism in which the escapement of a movement is housed within a revolving carriage. It was developed in an effort to attain better precision. When a watch is in a vertical position, the force of gravity will speed the balance wheel as it moves in its downward (arc) direction and slow it as it moves upward, creating deviational errors of timekeeping. By placing the balance and escapement in a carriage that revolves 360° per minute, these errors become averaged and the timekeeping becomes constant and consequently adjustable. Created by Abraham Louis Breguet in 1795, the tourbillon is considered a difficult and complex achievement by any watch manufacturer