Gerald Charles

Maestro 9.0 Tourbillon Gem-Set Diamonds


The Maestro 9.0 Tourbillon Gem-Set Diamonds is a Limited Edition of 10 pieces, based on the Maison's first ultra-thin skeleton watch. The gem-set watch is themed around diamonds, and features 66 baguette-cut stones of the highest purity set by hand into an 18K white gold bezel by specialist gem-setter Salanitro Geneve. The case is in medical grade stainless steel.



Detail of Dial

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Manufacture caliber, Gerald Charles development GCA 3024/12


Central hour, minute hands and seconds on the tourbillon at 6h

Power reserve

50 hours

Water Resistance



Flying tourbillon Ref. GCA 3024/12

The Maestro 9.0 Tourbillon is powered by the automatic flying tourbillon caliber, Ref. GCA 3024/12. This exclusive manufacture movement features bespoke bridge designs decorated with a special vertical Côtes de Genève pattern inspired by tailoring, thanks to Mr. Genta’s Italian heritage. Anglages diamond polished. Radial côtes de Genève finished bridge of the tourbillon. Yellow gold colour engravings. Gerald Charles’ team succeeded in realizing a highly sophisticated 60-seconds flying tourbillon that oscillates at 4 Hz and in delivering a highly technical mechanical watch that remains incredibly slim, measuring just 9mm thick.


Automatic flying tourbillon, 50-hour power reserve, stop-second system


28.00mm diameter, 4.87mm total thickness

Number of components

196 pieces


28’800 A/h - 4Hz


60-seconds Titanium flying tourbillon cage with three personalized head screws, patented design

Oscillating weight

Central oscillating weight in 22K rose gold 4N, vertical brushed Gerald Charles “honeycomb” motif with polished outlines

Tourbillon bridge

18K yellow gold bridge which secures the tourbillon to the movement

Shock resistance

5G shock resistance, tested with 5 axes robotic arm. Incabloc® anti-shock system


An homage to the Maestro flying tourbillon created in 2005 by Mr. Gérald Charles Genta

The Maestro 9.0 Tourbillon case is crafted in medical-grade stainless steel and hosts a 60-seconds flying tourbillon cage in titanium in the shape of the Maison’s GC logo. The flying tourbillon is a complication dear to our Maison, as the Maestro case’s signature “smile” at 6 o’clock was originally conceived to host the Tourbillon’s cage.


Width: 39.00mm Lenght: 41.70mm Thickness: 9.00mm Entrecorne: 22.00mm


Medical-grade stainless steel 316L


Hand-polished case, vertical brushed case back


Original design by Mr. Gérald Charles Genta


Screw-down crown with Clous de Paris finish and embossed logo


Carved with CNC numeric control machinery. Asymmetric polygon with smooth edges

See-through case back


White gold

Gem set

66 diamonds VVS, 2.52 ct. baguette cutting

Discover the 9.0 Tourbillon