Important Watches, Collector's Wrist...

Hong Kong, Jun 08, 2001

LOT 249

Gérald Genta, Genève, "Tourbillon", Ref. 4028.7. Produced in the 1990's.Very fine, self-winding, 18K yellow gold gentleman's wristwatch with one minute tourbillon regulator, 64 hours power reserve, date, black strap with 8 engraved gold cylinders and 18K pink gold Genta double clasp.

HKD 140,000 - 190,000

USD 18,000 - 24,000

Sold: HKD 184,000

C. two-body, solid, polished, engraved band, winding-crown and bezel, transparent case back with screws, cylindrical hooded lugs forming part of the strap decoration. D. green with tritium-coated applied dot indexes, auxiliary seconds dial, sector for the Up-and-Down indication, outer graduation for the days of the month, aperture for the tourbillon. "Epée" tritium-coated gold hands. M. Cal. 10, engraved gilt brass, 23 jewels, tourbillon regulator, monometallic balance,lever escapement self-compnsating flat balance-spring, 18K engravedgold rotor.Dial, case and movement signed.Diam. 35 mm.


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Grading System
Case: 1

As new
Movement: 1*

As new

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

Notes

What is a Tourbillon ?A Tourbillon is a regulating mechanism in which the escapement of a movement is housed withina 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 wheeel as it moves in its downward (arc) direction and slow 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 thetimekeeping becoms constant and consequently adjustable. Created by Abraham Louis Breguet in 1795, the tourbillon is considereted a difficult and complex achievement by any watch manufacturer.