Académie Horlogère des Créateurs Indépendants


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Gerald Genta

Tourbillon Sonnerie Repetition "Piece Unique" CHF 290 000


A unique, impressive and extremely complicated yellow gold grande and petite sonnerie minute repeating wristwatch with Westminster chime and tourbillon, from the haute horlogerie Swiss watch brand Gérald Genta, founded in 1969 and active until 2010. Estimated production period: 2004–2010. Сase in 18k yellow gold, diameter 41mm, sapphire caseback. Openworked dial with spherical polished indexes, and ‘filet sauté’ guilloché motif. Caliber GG 31001, hand-wound, with reversed hand-fitting, chiming and repeating on four hammers onto four gongs, marked by Poinçon de Genève quality mark. Power reserve of sonnerie mechanism: 24 hours in grande sonnerie mode, 28 hours in petite sonnerie mode. Functions – sub-dial for indication of time in hours and minutes at 3 o’clock, tourbillon at 10 o’clock, grande and petite sonnerie and minute repeater with Westminster chime with four striking hammers and four gongs, sonnerie selectors (‘grande/petite’ and ‘silence/chime’) and power reserve indicators (of the caliber and the sonnerie mechanism) installed on the back of the case. Gérald Genta black leather strap with 18k yellow gold Gérald Genta pin buckle. 


The Grande Sonnerie Carillon Westminster Tourbillon Ref. GS1.X.20.893.CN.BA Piece Unique would appear to be a fine purchase for the collector thanks to its outstanding and memorable design, elaborate hand finishing and decoration of the caliber, and the extraordinary combination of Empire and Baroque styles. The grande and petite sonnerie function, as well as a minute repeater is extremely rare and the most complicated among traditional mechanical haute horlogerie complications, made even more sophisticated by the addition of a tourbillon. It would also be a fine occasion for the collector to obtain one of the iconic timepieces of modern haute horlogerie, originating from Gérald Genta, one of the most well-respected names of luxury watchmaking.


Gérald Genta, considered to be one of the most important modern watch designers and actually the inventor of this profession, during his career collaborated with many renowned Swiss watch manufacturers including Patek Philippe, Audemars Piguet, IWC, Universal Genève, Omega, Bulgari, Cartier, Seiko and others. World famous as the father of the Nautilus and Royal Oak designs, he started his own line in 1969. The Gérald Genta brand is widely known for its outstanding, daring, sometimes provocative designs, fine craftsmanship, and extraordinary uber-complicated sonnerie models. The first version of the Grande Sonnerie movement with a grand chime function, cathedral (Westminster) quarter chime, minute repeater and tourbillon was completed in 1994 by Pierre-Michel Golay, who had been working at Gérald Genta since 1973 and at the time was their technical director. From 2002, he headed the R&D department at Franck Muller. The Gérald Genta brand is now owned by Bulgari, which acquired it in 2000. In 2010 the production of collections with the Gérald Genta brand name ceased to continue, although in 2020 they were restarted, albeit on a very small scale. After 2010 Bulgari continued to produce Grande Sonnerie watches under its own brand name. 

Since 1994, Grande Sonnerie wristwatches have been produced in extremely limited quantities, usually a few per year, with the production of one watch usually taking about one year. During its production span, the ultra-complex movement was constantly modernised, and various versions of it were also developed. This includes the caliber 31001 of the present example – hand-wound, chiming and repeating on four hammers onto four gongs, playing a Westminster chime with a different tune for each quarter – and a handful of self-winding movements featuring various configurations with a traditional or retrograde time indication, or with a perpetual calendar. The peculiarity of the present caliber 31001 lies in the use of a reversed hand-fitting scheme, so that the chiming and repeating mechanism, which is usually situated under the dial, is fitted on the reverse side of the watch, while the time indication, tourbillon, striking hammers and gongs are on the dial side of the watch. This scheme was used by Gérald Genta extremely rarely, much less often than other, self-winding versions. 

The present example features the hand-wound caliber 31001, chiming and repeating on four hammers onto four gongs, playing a Westminster chime with a different tune for each quarter

The present example is also peculiar in the extraordinary combination of two styles. The round case of the Arena collection and the dial with polished spherical indexes and sword-shaped hands are unmistakably of the Empire style, while the operating elements (the winding and switching crowns, repeater start button), as well as the caliber with golden bridges, decorated by flamboyant ‘fleurisanne’ engraving in the ‘mille fleurs’ version, are signs of the Baroque style. The ‘fleurisanne’ style, which rarely appears in wristwatches (solely of the high-end category), is known to connoisseurs as one of the ways to decorate luxury pocket watches produced in the 19th century for the Chinese market – the so-called Montre Chinoise, whose manufacturers were concentrated in the Swiss town of Fleurier (Val-de-Travers valley, Neuchâtel canton). 

Finished to the highest standard, this watch reveals an appealing flamboyant side of high watchmaking art – haute horlogerie. 


CaseYellow gold case 750/1000 with a sapphire caseback, crown grande sonnerie pusher at 9 o'clock, grand or little sonnerie pusher at 10 o'clock, silence or striking pusher at 7 o'clock
StrapOriginal black Alligator strap, with a original yellow gold pin buckle
DialSkeletonized dial, with a Tourbillon display at 10 o'clock, time display at 3 o'clock
MovementFinely engraved & gold plateded hand-wound movement, with one minute Tourbillion, grande & petite sonnerie with 4 hammers, minute repeater, power reserve indication, Poinçon de Genève


Case:Very good, small signs of wear
Strap:Very good, small signs of wear
Dial:Mint condition
Movement:All functions working properly
Amplitude (Dial on top/Lift angle 52):Approx 300°
Accuracy (Dial on top):Approx -10 sec / day


We offer worldwide delivery on all of our watches.

If ordering from Switzerland or Europe, your watch will be sent the same working week. The courier will depend on the value of the watch, with all watches delivered the next working week.

If ordering from outside Europe, delivery will depend on the choice of courier and destination.

You can cancel your order without giving any reason, within 14 days from the day the watch has been delivered to you.


All of our pre-owned watches have undergone thorough mechanical inspections, including being ultrasonically cleaned, serviced and resealed if appropriate and tested for at least four days, to ensure they meet our highest timekeeping standards.

Our pre-owned and vintage watches, unless stated otherwise, are covered by a full or a limited twenty-four month warranty. For example, due to their age, some vintage watches should not be subjected to the same conditions as when they were new.

All of our new watches are covered by the warranty from the original manufacturer. Please contact us for further information.

Please see our Terms & Conditions for further information.



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