Important Collector's Wristwatches, P...

New York, Sep 17, 2009

LOT 366

Edward Piguet Tourbillon Audemars Piguet, Genève, "Edward Piguet Tourbillon," No. 7, case No. E 64389, Ref. 25843OR. Made circa 2001. Very fine and very rare, rectangular, skeletonized, 18K pink gold wristwatch with visible one-minute tourbillon regulator and an 18K pink gold Audemars Piguet deployant clasp.

USD 40,000 - 60,000

EUR 28,000 - 42,000 / CHF 43,000 - 65,000

C. Two-body, solid, polished and brushed, stepped bezel, transparent case back with 4 screws, sapphire crystals. D. Transparent with painted black Arabic numerals and indexes, at 6 aperture for the visible tourbillon cage under a polished steel bridge, carrying the subsidiary seconds hand. Black baton hands. M. Cal. 2881, skeletonized and handengraved, copper-colored, 19 jewels, lateral lever escapement with one-minute tourbillon regulator with steel cage and 3 equidistant polished steel arms, monometallic balance adjusted to heat, cold and 5 positions, self-compensating Breguet balance-spring. Dial, case and movement signed. Dim. 29 x 49 mm. Thickness 13 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.